最新《100以内不退位减法》资料
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2024人教版二年级上册数学《100以内的加法和减法(二):不退位减》教学设计一、教学目标核心素养:1.1 知识与技能:•学生能够理解并掌握两位数减两位数不退位减法的计算方法。
•学生能够正确运用竖式进行两位数不退位减法的计算,并得出正确的结果。
1.2 过程与方法:•通过观察、操作、讨论等活动,引导学生探索两位数减两位数不退位减法的计算过程,培养其自主学习和合作探究的能力。
•引导学生通过练习和反思,总结两位数不退位减法的计算规律,提高计算的准确性和速度。
1.3 情感、态度与价值观:•激发学生对数学学习的兴趣,培养其认真细致的学习态度。
•通过解决实际问题,让学生感受数学与生活的联系,增强其数学应用意识。
二、教学重点•掌握两位数减两位数不退位减法的计算方法,并能正确运用竖式进行计算。
三、教学难点•理解并掌握不退位减法中借位与不退位的区别,正确进行竖式计算。
四、教学资源•教学课件或黑板•小棒、计数器等辅助教具•练习纸、铅笔等学具五、教学结构设计1.复习创设情境引入课题•复习整十数减整十数及一位数减一位数的减法,为新课学习做铺垫。
•创设生活情境,如购物找零、比较数量差等,引出两位数减两位数不退位减法的需求。
2.初读课文识记生字•如果教材中有相关文字描述,指导学生阅读并识记与两位数不退位减法相关的生字词汇。
3.整体感知理清层次•通过观察例题,引导学生整体感知两位数减两位数不退位减法的结构。
•帮助学生理清计算步骤和思路,明确不退位减法的计算规则。
4.教学活动•小组合作:学生分组讨论两位数减两位数不退位减法的计算方法,并尝试用竖式进行计算。
•教师演示:教师用竖式演示两位数减两位数不退位减法的计算过程,强调对齐数位和正确计算。
•学生练习:学生独立完成练习题目,教师进行巡视指导,及时纠正错误。
5.总结拓展•总结两位数减两位数不退位减法的计算方法和注意事项。
•拓展其他类似的减法问题,引导学生进行思考和解答。
六、板书设计《100以内的加法和减法(二):不退位减》一、不退位减法概念- 两位数减两位数,个位与个位相减,十位与十位相减- 被减数每一位上的数都大于或等于减数对应位上的数,不需要借位二、竖式计算步骤1. 对齐数位2. 从个位开始减3. 计算结果三、例题演示- 展示例题计算过程四、练习题目- 列出几道练习题七、课后反思•反思学生在两位数减两位数不退位减法计算过程中的表现,是否掌握了竖式计算的方法和步骤。
100以内不进位不退位加减法52-50=58-7=99-10=98+1=70+29=57-6=37-2=43-40=79-40=7+40=36+4=76-3=79-1=1+22=63-20=82+8=79-30=19-7=78-60=34-2=66-6=1+79=95-2=97-3=69+30=77-40=54-50=86-80=84-40=56-1=6+4=70+2=95-10=59-3=4+55=97-30=6+62=10+76=35+10=16-2=50+18=30+69=51+40=45-4=40+12=34-4=33+3=33+4=19+30=81-10=80+6=44+4=1+37=41+6=4+52=20+42=15+5=72+5=68-10=44+50=100以内不进位不退位加减法58-50=45-5=66-3=14-2=27+20=79-5=1+80=67+30=55-1=75-3=98-90=96-3=1+19=29+60=43-3=20+48=74+1=3+4=9+10=1+9=99-6=98-40=93+6=10+9=46+3=74+1=100-20=17-10=50+4=16+70=20+14=38+2=90-30=46-3=92-30=95-20=9+30=30+52=63+30=84-30=4+2=98-8=93-2=18-6=52-2=47-30=14+10=40+21=73+20=46-3=5+81=10+10=83-20=1+22=32-1=87-2=10+18=6+43=1+93=94-80=100以内不进位不退位加减法91-20=39-30=2+0=78-5=60+8=29+10=11+4=92+6=67-5=65-3=40+1=59-30=100-30=78-10=48-5=90+0=20+14=71-30=64+30=9+40=96+2=25-20=35-2=20+48=21+8=2+40=10+5=30+3=95-80=33+4=10+86=60-30=44+30=10+80=26-4=4+3=40+9=100-30=95-2=21+30=97-5=66-4=83-30=5+15=20+31=79-3=27-7=60+12=86-6=3+34=81-70=44-1=50+9=38-6=52-50=40+7=63-50=47-4=10+16=38-20=100以内不进位不退位加减法45-2=98-90=81+8=87+2=95-3=26-3=11+80=25-3=77-5=43-20=0+50=92+3=49+10=63+30=30+7=3+70=2+4=89-7=13+2=17-3=37-5=54+4=83-2=35-20=29-4=66-10=2+23=1+68=1+12=2+10=0+2=10+28=96-90=62+6=37+30=76-10=75-70=94-3=68+20=49-40=69-8=25-10=17+80=86-4=43+50=16-1=16-5=45+20=74-20=7+0=87-4=10+82=48+30=62+5=14+4=46+2=2+36=84-3=40+1=53-30=100以内不进位不退位加减法15+40=89+1=40+5=77-5=76-20=1+62=66-60=4+5=39-9=75-40=10+55=21-1=65+1=6+52=21+40=78-5=55-30=17+1=79-6=84-40=92-10=58-2=34-1=62-1=10+8=52+7=53+5=37+3=36-1=83-60=11-10=10+61=82-20=17-1=2+55=63-40=24-20=79+1=92-80=6+40=36-10=1+60=8+80=63-50=39-4=91-40=10+71=99-8=38-6=30+2=89-10=69-50=53-2=97-40=5+33=87-10=82-1=89+10=10+66=99-50=100以内不进位不退位加减法38-4=2+78=96-2=50+31=27-5=60+6=93-90=69-30=38-7=69-4=20+78=69-10=97-60=3+60=48-1=58+2=66-3=20+27=17+40=77-70=12+40=88-5=60+27=69+30=30+52=17-2=79-20=46+3=40+1=26+50=10+80=48-4=4+5=95-50=44-3=2+2=6+4=1+47=79-70=21-20=84+4=6+20=73+1=30+9=38-8=20+69=61-20=96-70=66+2=45-10=34-20=62+6=11+5=98-50=39-4=97-3=100以内不进位不退位加减法95-50=4+4=91+4=18+80=1+60=85-30=26-6=1+75=71-20=74-10=2+37=60+5=21+4=94+4=50+23=69-30=95+1=57-20=40-10=58-8=3+60=34+6=54+6=37-4=50+45=40+36=98-70=20+78=2+30=86+2=16+3=76-4=84-50=30+45=79-4=94-90=37-3=61+5=89-5=50+32=32-10=86-70=10+58=68-20=10+8=47-5=77-4=71-1=20+47=20+29=1+47=4+5=28-10=52+3=78-60=1+76=95-60=97-1=71+20=1+25=100以内不进位不退位加减法62+2=5+45=42+5=47-10=75+20=78-5=30+51=30+29=18-8=7+60=85-40=22+1=54+30=14+1=26+50=22+1=18-1=31+20=89-5=60+18=25+40=1+29=94-50=79-6=5+41=85-70=69-10=42-20=87-3=80+7=98-6=40+13=60+17=5+1=50+8=5+40=37+60=26-10=2+68=97-20=54-2=59-3=99-9=3+55=81+10=10+35=16-6=8+22=14+50=22+1=92-1=5+91=50+14=82+6=23+40=2+75=100以内不进位不退位加减法60+3=47-7=41+50=60-50=66-40=20+4=50+36=81+4=79-60=88-8=76-20=7+11=20+57=6+60=40-20=30+69=25-1=6+90=71-1=46-5=9+90=37-30=88-10=91-40=14+5=19-6=48-8=23+40=1+59=27-2=55-10=65-5=49-7=60+34=1+72=29+40=72+20=52-50=65+1=77-20=50+34=76-70=68+1=3+90=90-20=30+3=13+40=9+20=43+30=64-30=60+3=37-2=89-60=89-5=22+60=98-40=80+6=33-10=23-2=66-30=100以内不进位不退位加减法67-50=86+2=62+4=13+30=90-20=93-70=46+1=59-1=40+35=2+30=20+60=5+0=59-6=94-1=73-40=60+11=40+33=4+35=66-30=54-50=46-5=30+30=19-8=62+5=40+29=75-20=77-40=21+6=30+1=56-30=40+36=10+11=44+1=2+85=46-20=58-5=31-20=26+20=78+2=89-9=37-7=78-70=41+20=30+57=45+4=32-30=79-8=42-2=78+1=10+16=60+8=52+7=48-4=53-40=24-4=54+20=99-1=29+40=7+62=90+3=100以内不进位不退位加减法50+29=89-2=55+40=9+21=11+8=66-20=19-10=2+92=69-6=50+13=99-20=50+47=78-60=33-3=92+6=34-10=2+64=96-2=21-10=10+34=79-70=69-50=26+2=60+10=75-5=46-1=70+9=68-50=80-10=2+4=76-70=10+7=79-70=69-60=30+41=18-2=45-20=38-20=94-4=78-10=35-2=19+50=10+72=40-30=3+60=65-50=19-2=91-30=31+3=83-80=75-10=59-1=30+7=84-10=48-40=58-30=89-80=6+12=67-5=27-6=100以内不进位不退位加减法51+40=14-3=49-1=22-2=95-3=20+74=60+38=57+10=25+30=94-80=43-20=4+30=98-90=21+7=31+7=17-1=24-3=66-4=39-3=34-2=24+2=76-3=67-60=38-30=51+5=23-3=14+2=27+30=37-6=10+69=73+6=72+5=89-70=64-2=6+44=2+70=93-50=30+59=25-4=58-4=50-30=92-30=50+36=99-60=50+31=60+0=65+1=4+90=94-2=59-7=95-60=84-60=62+2=90-30=82+10=76-2=1+96=20+1=70+0=99-6=100以内不进位不退位加减法29-4=60-40=61+3=3+46=97-6=67-30=76-2=89-20=98-2=3+64=34+6=50+29=63-2=61-30=6+72=11+80=5+2=69-8=94-60=57-10=1+91=46-1=87-5=58-8=36-30=86-6=21+4=31-1=78-3=34-30=16-10=50+46=75-4=38-7=68+1=60+26=9+50=30+32=20+74=6+43=64+1=22+2=87-7=75-20=7+43=24+20=20+73=40-20=35+5=5+42=9+50=30+33=95-10=7+20=5+20=7+3=76-50=25-3=73-30=6+3=100以内不进位不退位加减法60+9=40+28=30+6=72+2=60+34=55-40=5+10=3+60=77-30=2+74=40+6=79-7=3+51=78-70=4+90=20+56=13-3=13+1=59-2=63+1=58-50=88-70=73-30=73+1=85+2=20+29=75-20=49-3=8+21=30+18=1+15=100-50=75-30=90+5=69-9=67-30=15-10=16-4=7+21=54-3=30+39=15-4=5+4=98-8=65-40=85+1=20+35=90-70=80+6=11+8=77-30=63+6=42+40=25+40=52-50=70+5=27-3=5+12=51+4=13-2=100以内不进位不退位加减法50+9=56-20=50+0=2+92=18-5=52-2=23+4=50+3=20+73=86-3=49-7=19-5=66-40=89-30=5+62=93-30=4+84=14+80=95-1=79-4=40-20=3+70=87-40=48-40=20+3=2+66=66-60=9+20=80-50=94-80=50+7=30+6=4+24=73-30=25-4=3+94=83-80=79-8=92+3=40+42=18-10=51-30=16+20=63-40=7+40=50+35=90+1=1+33=23+7=6+30=84-30=98-70=88-70=47-2=5+65=93-3=2+47=77-4=23-20=50+30=100以内不进位不退位加减法36-2=54-50=50+48=39-3=2+44=3+94=3+5=4+26=30+48=31-10=67-10=50-30=12+20=48-8=20+24=66-4=3+90=94-3=93-20=27+20=15-5=50+33=99-40=5+1=10+31=83+1=31+40=34-2=80-10=49-2=2+43=68-3=82-1=99-3=50-30=48+1=63-60=49-7=68-50=6+34=59-20=71+5=29-8=33-1=24-3=30+34=26+60=99-5=6+93=31+20=2+61=27+60=96-90=99-10=96-1=49-40=86-70=10+50=74+5=72-1=100以内不进位不退位加减法74+6=79-20=8+91=70+9=40+56=12+10=20+7=40+50=53+1=42+5=36+60=23-1=62-2=4+0=98-8=96-80=95-60=34-4=95+1=71-70=70+20=77-4=26+70=73+10=20+29=44-10=20+5=7+33=80+17=81+10=27-2=17-3=5+0=57-50=6+50=67-3=46+40=50+1=75-3=50+28=4+13=82+4=78+1=32-1=88-10=1+97=90+7=18-4=59-7=43-3=10+59=90-30=79-40=23+4=26-3=4+72=2+38=80+11=2+41=1+49=100以内不进位不退位加减法4+11=35+3=44+2=50+18=20-10=59-20=68-2=15-10=40+10=19-9=7+23=93-50=57+20=3+53=77-70=10+72=63-30=45+50=31-20=71-30=12-2=10+30=34-1=7+81=3+55=25+60=85+4=7+81=71+20=38-30=40+22=49-6=10+29=44-20=32+4=70+2=97-70=100-30=4+5=1+33=92-40=62+20=62-60=58-7=63-20=51+10=69-9=10+80=20+72=34+10=30+44=7+70=25-3=2+30=93-70=4+53=71-60=4+43=10+61=74+4=100以内不进位不退位加减法59-20=83-3=23-3=73-70=55-2=51+1=63-40=20+1=10+25=1+8=32+6=30+58=82-20=69+30=96-90=61+20=70+4=70-50=77+2=5+1=2+15=10+11=46+30=1+30=45-30=46-40=11+50=100-30=5+40=1+38=45+20=95-60=75-70=94-50=54-1=85-2=19+80=90-80=99-10=54+20=34-3=40+40=17-10=26-5=2+18=76+20=76+4=87-4=21+3=26-4=82+7=47-3=1+13=98-8=42+50=11+9=27-10=6+52=49-1=60+11=100以内不进位不退位加减法69-60=1+60=88+10=79-5=48-10=9+30=97-10=94-2=56-6=4+2=7+40=2+20=60+10=40+39=84-2=3+65=51-20=3+50=59-5=10+52=75-4=41+40=63-40=69-60=9+30=49-10=87-6=10+80=8+41=1+94=23-1=85-3=97-90=2+76=36-1=99-60=40+20=7+21=78-5=48-8=46-30=60-40=42+8=35-20=3+42=40-10=40+38=17+1=31+30=86-70=73-70=10+19=44-1=90+2=71-20=84-1=87-4=40+33=28-2=67-40=。
《两位数减两位数(不退位减)》课堂教学设计及反思【教学目标】1、掌握两位数减两位数(不退位减)的笔算方法,掌握竖式的书写方法和格式。
2、尝试从生活情境中提出简单的数学问题,并能解决问题。
【教学重点】两位数减两位数(不退位减)的笔算方法。
【教学难点】理解两位数减两位数(不退位减)的算理。
【教学过程】一、复习旧知。
1、复习100以内的加法。
师:之前的两节课我们学习了100以内的加法,包括不进位加法和进位加法,大家现在都会算么?我们在学习新的知识之前,先通过几道题复习一下加法的计算方法。
板书:23+45=74+17=38+56=34+23=86+7=12+43=教师叫6位同学上讲台演算。
其他同学在练习本上做。
做完后,教师进行点评和总结,强调进位加法和不进位加法竖式的书写规范和计算方法,对学过的知识进一步总结和归纳,让同学们加深记忆。
2、复习简单的减法。
师:我们今天来学习100以内的不退位减法。
首先,我们复习一下10以内的简单减法。
教师随机口头出题,让同学快速回答,如:“9-4”“7-2”“8-6”。
经过几分钟的训练,让同学熟悉和回顾10以内的简单减法,为本节课不退位减法的学习做铺垫。
二、学习新知。
1、教学例1。
师:今天我们来学习100以内减法中的不退位减法。
同学们先将课本翻到17页,看书上的图。
教师先提问几个问题引起同学的兴趣,如:大家知道奥运会么?奥运会几年举办一次?大家知不知道2008年的奥运会是在哪里举办的?2008年奥运会哪个国家取得的金牌最多?然后,教师引导学生读金牌榜。
师:同学们都看完了么?现在请大家翻到课本的第18页,看例题1。
教师板书:“美国比俄罗斯多多少枚金牌?”教师带同学审清题意,弄清条件和问题,找到有用的数据。
师:哪位同学能告诉老师这道题怎么列竖式?教师根据同学的回答进行总结,板书:36-23=。
师:现在我们已经列出了算式,接下来就要计算了,怎么计算呢?哪位同学能计算出来,请举手。
姓名________班级________用时________得分________ 60-20= 82-50= 71-20= 62-50= 46-24= 50-20= 43-12= 67-33= 80-10= 27-14= 37-25= 64-53= 45-11= 35-20= 83-30= 26-14= 32-20= 80-10= 76-54= 42-10= 21-10= 51-40= 42-31= 84-31= 23-11= 41-10= 44-12= 46-13= 87-20= 57-34= 36-12= 81-70= 54-40= 42-31= 23-12= 27-12= 52-20= 76-25= 72-40= 67-41= 65-20= 62-50= 54-40= 25-12= 51-10= 60-20= 54-42= 43-12= 41-30= 85-44= 67-35= 87-53= 54-22= 23-12= 36-12= 34-10= 40-20= 50-40= 43-32= 82-61= 60-40= 21-10= 43-31= 87-42= 87-26= 57-20= 61-50= 65-40= 81-60= 86-30= 75-22= 64-11= 72-30= 71-20= 45-13= 67-52= 85-64= 35-12= 54-23= 86-15= 33-12= 80-30= 74-11= 51-30= 80-40= 55-34= 34-10= 52-10= 21-10= 30-10= 22-10= 60-30= 74-51= 20-10= 66-40= 35-10= 81-20= 66-43= 82-50= 21-10=姓名________班级________用时________得分________ 42-31= 23-12= 65-32= 86-12= 72-51= 43-20= 40-10= 80-60= 40-10= 34-11= 43-32= 53-20= 37-21= 45-31= 46-31= 20-10= 74-10= 80-10= 37-16= 60-30= 87-11= 53-22= 54-13= 61-40= 22-10= 76-52= 77-12= 51-40= 56-12= 62-31= 66-55= 85-40= 46-31= 57-40= 67-46= 23-12= 86-61= 77-40= 73-20= 74-43= 75-51= 30-20= 85-73= 72-50= 22-10= 23-11= 31-10= 42-11= 44-21= 47-13= 41-30= 70-40= 24-11= 21-10= 43-12= 24-13= 33-21= 81-10= 55-32= 24-12= 25-12= 61-40= 25-12= 26-14= 86-22= 82-70= 40-10= 81-10= 35-10= 87-46= 26-14= 40-20= 76-31= 50-40= 61-50= 54-11= 26-14= 60-40= 63-41= 53-10= 56-35= 62-51= 66-12= 22-11= 46-25= 40-30= 24-10= 20-10= 82-70= 31-10= 65-30= 87-60= 33-10= 81-40= 75-21= 56-45= 62-20= 46-24= 44-20= 87-20=姓名________班级________用时________得分________ 81-60= 40-20= 87-64= 41-20= 51-10= 50-30= 24-10= 65-23= 43-12= 47-16= 65-22= 22-11= 33-10= 30-10= 73-30= 27-15= 53-12= 35-11= 84-32= 86-21= 42-30= 31-10= 25-13= 32-21= 63-50= 40-30= 82-61= 63-22= 45-24= 27-14= 41-10= 27-10= 83-22= 51-10= 63-12= 54-22= 61-30= 57-11= 45-12= 43-11= 82-10= 30-10= 54-12= 33-21= 31-20= 42-11= 71-40= 46-10= 55-23= 36-22= 44-32= 67-11= 21-10= 36-20= 61-40= 44-13= 53-32= 80-40= 30-20= 47-11= 37-14= 41-30= 72-40= 43-30= 21-10= 84-40= 73-61= 64-31= 34-11= 74-51= 43-30= 52-20= 80-70= 51-10= 46-13= 55-13= 34-12= 73-22= 62-51= 73-22= 60-40= 81-20= 77-36= 32-10= 36-24= 23-12= 33-11= 73-42= 65-21= 30-20= 67-42= 63-21= 64-53= 56-45= 84-60= 30-10= 24-10= 27-15= 85-61= 73-52=姓名________班级________用时________得分________ 84-12= 63-10= 23-10= 43-12= 70-50= 85-63= 23-11= 71-40= 21-10= 81-30= 75-10= 36-20= 81-20= 80-40= 40-20= 67-56= 65-23= 62-40= 23-11= 76-10= 27-11= 44-23= 84-32= 37-24= 23-11= 31-20= 62-50= 51-10= 36-20= 34-11= 81-20= 45-33= 45-23= 23-11= 34-23= 86-12= 71-10= 72-21= 75-11= 43-10= 61-20= 56-33= 33-21= 83-61= 44-22= 31-20= 52-20= 76-22= 80-10= 37-23= 37-25= 56-35= 67-56= 44-10= 72-20= 27-12= 37-22= 80-10= 25-13= 75-22= 62-30= 26-11= 57-34= 34-11= 56-41= 27-13= 52-41= 27-16= 65-11= 30-20= 23-11= 83-50= 67-15= 26-13= 40-10= 55-14= 57-43= 26-10= 77-12= 32-21= 76-41= 40-30= 84-23= 84-42= 61-30= 75-12= 53-12= 26-15= 74-33= 35-13= 33-20= 75-43= 65-42= 44-32= 42-30= 24-11= 70-60= 31-20= 61-10= 32-11=姓名________班级________用时________得分________ 64-23= 55-43= 74-12= 77-21= 77-63= 55-31= 75-12= 81-60= 20-10= 64-30= 74-30= 32-21= 20-10= 57-42= 32-11= 43-31= 77-15= 50-20= 47-33= 65-41= 24-11= 45-32= 25-11= 23-10= 26-14= 77-55= 75-12= 73-11= 67-11= 73-61= 71-10= 83-42= 60-50= 62-20= 65-43= 85-51= 22-11= 20-10= 27-15= 24-12= 75-12= 63-21= 31-10= 41-10= 22-10= 43-32= 83-42= 81-60= 85-13= 31-10= 75-34= 56-14= 65-14= 65-44= 33-10= 81-60= 27-16= 62-50= 26-11= 87-43= 31-20= 77-31= 53-41= 21-10= 20-10= 67-31= 51-30= 85-53= 32-10= 64-21= 74-51= 76-30= 82-71= 60-50= 31-10= 61-10= 57-25= 43-11= 53-21= 47-14= 26-15= 30-20= 31-20= 62-10= 73-40= 41-30= 71-10= 46-34= 26-11= 63-42= 54-30= 81-20= 60-30= 47-25= 34-13= 25-10= 67-20= 80-60= 45-23= 22-10=姓名________班级________用时________得分________ 50-10= 51-30= 34-21= 74-51= 36-22= 31-20= 43-32= 53-12= 46-35= 41-10= 24-10= 62-20= 64-20= 53-20= 43-22= 43-11= 43-12= 71-40= 53-10= 44-12= 71-10= 23-12= 25-12= 26-12= 52-41= 43-32= 60-40= 20-10= 42-31= 30-10= 64-40= 56-22= 47-30= 66-52= 66-53= 22-11= 25-14= 82-60= 67-15= 54-10= 83-72= 55-41= 87-32= 37-10= 70-50= 52-10= 62-50= 84-62= 32-21= 55-40= 47-32= 63-10= 31-10= 41-30= 47-23= 77-36= 22-11= 85-43= 72-50= 43-11= 80-10= 47-32= 73-21= 85-44= 86-53= 27-14= 80-40= 76-20= 63-11= 50-20= 67-24= 75-64= 71-60= 43-11= 33-10= 47-10= 32-20= 76-30= 43-31= 70-30= 54-13= 33-11= 22-11= 36-25= 42-30= 36-22= 52-41= 62-40= 55-13= 87-31= 42-30= 75-10= 76-14= 77-53= 26-13= 46-13= 47-30= 73-21= 66-33= 52-20=姓名________班级________用时________得分________ 67-52= 23-12= 61-50= 43-11= 42-11= 51-30= 27-13= 75-50= 34-10= 53-42= 82-61= 64-22= 44-33= 60-10= 53-42= 71-30= 64-20= 63-31= 80-70= 54-22= 63-32= 40-10= 50-30= 24-10= 26-14= 85-51= 62-50= 27-10= 55-21= 81-50= 65-43= 84-72= 52-31= 20-10= 87-74= 71-20= 61-30= 86-34= 80-60= 43-20= 65-23= 26-12= 85-63= 37-16= 45-23= 52-41= 47-13= 23-12= 25-13= 70-50= 63-42= 66-51= 67-30= 32-20= 66-33= 32-11= 50-20= 43-32= 51-40= 40-10= 62-21= 63-51= 22-10= 84-20= 20-10= 74-52= 61-40= 65-52= 80-20= 81-70= 42-31= 85-20= 26-10= 26-13= 33-12= 37-21= 35-11= 35-22= 37-14= 21-10= 46-34= 77-36= 43-30= 26-10= 85-52= 55-13= 27-11= 65-32= 84-22= 21-10= 53-12= 24-11= 77-61= 84-22= 30-10= 25-13= 46-22= 84-63= 84-10= 62-20=姓名________班级________用时________得分________ 50-20= 77-61= 37-24= 53-12= 56-45= 41-10= 20-10= 56-25= 73-41= 57-23= 52-21= 66-50= 71-10= 31-10= 23-12= 46-30= 63-10= 56-30= 20-10= 83-52= 85-60= 83-21= 32-21= 21-10= 27-12= 56-14= 80-50= 87-20= 82-40= 83-51= 63-21= 54-23= 30-10= 64-51= 55-11= 54-22= 31-10= 46-33= 56-23= 20-10= 60-20= 65-32= 64-12= 76-42= 72-41= 31-20= 27-13= 27-11= 46-23= 41-30= 86-10= 51-10= 30-20= 27-12= 71-30= 56-11= 33-11= 63-41= 30-20= 35-23= 73-61= 84-50= 45-10= 52-20= 81-40= 45-33= 27-13= 50-30= 81-40= 35-13= 50-20= 41-10= 45-23= 81-40= 56-23= 37-12= 55-14= 85-21= 20-10= 56-25= 42-10= 31-10= 31-20= 70-40= 77-20= 61-30= 42-30= 54-22= 53-32= 84-60= 30-10= 51-30= 34-20= 81-40= 23-12= 35-12= 36-13= 22-11= 31-20= 44-30=姓名________班级________用时________得分________ 85-42= 43-11= 34-21= 41-20= 35-24= 57-44= 65-14= 80-60= 24-12= 32-11= 87-51= 71-30= 60-40= 41-10= 34-21= 30-20= 66-33= 44-33= 23-11= 30-10= 43-21= 25-12= 84-33= 30-20= 54-30= 54-11= 60-10= 51-10= 50-10= 33-11= 43-10= 32-20= 32-21= 84-40= 52-21= 66-24= 76-13= 25-10= 66-33= 52-30= 42-20= 76-43= 57-22= 57-46= 66-52= 27-14= 30-10= 22-11= 66-53= 30-10= 56-24= 23-10= 53-21= 66-23= 36-14= 55-31= 20-10= 25-14= 37-24= 36-24= 85-20= 82-41= 67-32= 74-61= 43-21= 37-25= 82-50= 50-30= 27-16= 76-33= 40-30= 77-66= 76-10= 45-31= 20-10= 51-10= 84-63= 26-13= 30-20= 30-20= 63-22= 33-10= 80-50= 81-10= 35-14= 35-20= 22-11= 82-61= 84-42= 46-12= 24-12= 27-15= 72-51= 51-20= 26-13= 46-15= 23-10= 36-11= 46-25= 23-12=姓名________班级________用时________得分________ 87-20= 87-51= 63-32= 72-51= 82-41= 42-20= 46-12= 75-62= 34-10= 80-50= 63-32= 27-16= 24-11= 24-11= 34-20= 60-50= 24-11= 85-42= 73-60= 40-10= 55-43= 55-41= 62-51= 74-30= 32-21= 21-10= 31-20= 50-40= 40-30= 66-14= 20-10= 33-10= 40-10= 75-32= 25-14= 30-20= 40-20= 32-20= 75-52= 41-20= 23-11= 74-13= 67-50= 53-20= 35-20= 43-31= 75-52= 53-32= 43-21= 64-31= 67-43= 61-50= 82-10= 51-20= 85-52= 23-10= 24-12= 82-20= 65-41= 74-32= 44-20= 42-20= 33-11= 75-22= 73-50= 27-12= 55-42= 77-54= 41-10= 26-14= 66-10= 45-20= 25-14= 20-10= 63-42= 55-41= 63-31= 67-14= 45-12= 32-20= 47-26= 42-20= 41-10= 57-20= 62-50= 36-13= 42-30= 63-12= 27-15= 51-30= 23-10= 63-22= 26-13= 23-11= 24-10= 76-64= 87-55= 26-12= 62-30= 35-12=姓名________班级________用时________得分________ 55-42= 61-10= 74-20= 77-64= 65-51= 24-10= 65-21= 45-10= 46-14= 86-21= 32-21= 37-23= 64-53= 37-24= 65-32= 50-20= 70-10= 54-31= 46-25= 26-15= 70-60= 76-65= 42-21= 86-13= 73-20= 46-10= 21-10= 22-11= 81-50= 42-11= 32-10= 62-50= 54-12= 46-10= 34-21= 21-10= 85-12= 75-54= 81-20= 57-45= 60-40= 81-50= 66-24= 44-23= 67-13= 45-30= 51-10= 64-50= 70-40= 84-30= 87-74= 45-34= 60-30= 75-54= 54-32= 85-74= 75-50= 31-10= 34-21= 72-40= 46-21= 55-32= 55-14= 60-30= 30-10= 72-60= 34-10= 21-10= 41-30= 77-64= 81-40= 77-41= 24-12= 85-42= 62-21= 25-11= 44-23= 35-23= 84-13= 51-40= 36-14= 70-20= 33-20= 56-35= 65-22= 86-73= 42-31= 56-22= 24-10= 21-10= 82-10= 32-20= 87-25= 53-20= 35-24= 45-11= 63-21= 50-20= 73-42= 33-21=姓名________班级________用时________得分________ 45-33= 87-54= 75-61= 27-14= 27-11= 57-36= 76-53= 56-31= 86-22= 56-23= 61-40= 84-61= 82-21= 70-10= 63-51= 84-41= 71-40= 43-32= 55-30= 65-44= 21-10= 75-21= 44-23= 50-40= 83-22= 62-20= 53-31= 80-10= 42-30= 86-74= 46-10= 62-10= 30-10= 43-31= 30-20= 37-16= 51-10= 63-12= 34-20= 66-11= 74-41= 63-12= 26-14= 56-20= 51-40= 57-11= 72-41= 80-20= 76-43= 54-40= 86-64= 65-14= 74-30= 45-21= 80-30= 65-34= 44-32= 73-10= 30-20= 82-60= 73-61= 62-11= 32-11= 67-44= 20-10= 76-22= 25-13= 55-14= 31-10= 42-30= 62-21= 45-24= 86-13= 45-12= 24-12= 63-22= 66-54= 52-31= 46-11= 76-64= 62-11= 30-20= 77-43= 86-15= 82-31= 86-34= 22-10= 32-11= 67-36= 74-61= 75-31= 51-40= 44-31= 46-21= 82-71= 25-12= 67-32= 44-12= 52-30= 24-10=姓名________班级________用时________得分________ 74-41= 66-52= 82-21= 81-10= 55-43= 34-10= 40-20= 82-51= 84-50= 32-10= 35-13= 67-44= 43-20= 21-10= 34-10= 44-21= 52-31= 27-14= 67-42= 43-10= 84-33= 52-31= 67-10= 66-32= 70-30= 87-14= 32-11= 47-21= 36-22= 73-10= 23-12= 71-30= 50-40= 35-20= 45-14= 54-11= 54-30= 25-13= 32-21= 53-11= 74-51= 76-11= 46-33= 85-10= 32-10= 57-34= 42-21= 40-30= 57-36= 74-30= 77-54= 54-33= 51-30= 70-30= 55-34= 87-50= 35-21= 22-10= 30-10= 65-24= 41-20= 53-12= 83-42= 72-60= 62-40= 30-10= 50-20= 54-13= 50-30= 51-10= 51-10= 57-46= 74-61= 71-50= 26-14= 44-13= 87-52= 33-12= 34-23= 63-51= 20-10= 32-20= 64-10= 42-30= 37-22= 26-10= 74-32= 65-12= 56-14= 33-12= 81-60= 87-65= 81-60= 37-12= 76-65= 31-20= 35-24= 52-10= 40-30= 64-43=姓名________班级________用时________得分________ 34-22= 60-40= 44-22= 76-61= 33-12= 82-41= 72-50= 84-11= 42-10= 44-30= 23-12= 70-20= 81-40= 31-20= 37-23= 20-10= 22-11= 61-50= 36-15= 51-20= 56-25= 54-21= 56-43= 35-21= 23-11= 26-12= 51-10= 31-20= 81-20= 44-22= 54-23= 81-60= 24-13= 74-53= 42-10= 34-12= 43-31= 47-36= 62-40= 60-40= 53-11= 71-20= 32-10= 22-11= 44-23= 25-13= 83-52= 32-20= 22-11= 46-12= 76-30= 72-10= 24-11= 22-10= 33-11= 51-40= 26-14= 63-20= 66-14= 84-72= 57-40= 50-20= 35-22= 70-30= 32-20= 20-10= 36-25= 47-34= 25-13= 46-14= 74-63= 75-12= 54-20= 57-11= 27-11= 57-16= 60-30= 46-12= 43-20= 60-10= 20-10= 57-43= 53-21= 55-12= 31-20= 50-30= 20-10= 23-10= 26-12= 75-24= 84-33= 60-30= 81-20= 63-31= 20-10= 27-16= 60-20= 83-42= 57-10= 73-40=姓名________班级________用时________得分________ 61-30= 47-36= 40-10= 27-11= 40-30= 51-10= 86-63= 64-42= 83-11= 62-50= 37-25= 85-21= 44-11= 54-23= 70-10= 32-10= 56-45= 84-13= 60-20= 76-10= 32-20= 66-45= 71-60= 65-21= 54-40= 41-10= 70-50= 72-51= 41-10= 55-40= 46-33= 34-10= 77-64= 54-11= 42-10= 85-22= 71-50= 46-32= 36-15= 51-30= 50-40= 27-12= 52-10= 47-33= 47-13= 60-50= 63-30= 66-44= 41-20= 62-51= 37-14= 85-41= 30-10= 30-20= 85-10= 76-52= 52-11= 20-10= 23-12= 67-22= 35-23= 20-10= 81-20= 70-40= 21-10= 46-25= 32-11= 30-10= 54-31= 40-20= 27-15= 26-13= 24-10= 85-72= 81-60= 21-10= 43-31= 72-20= 86-22= 86-50= 32-20= 34-10= 54-21= 70-50= 61-40= 71-60= 40-20= 20-10= 65-12= 24-11= 36-15= 26-13= 30-10= 42-20= 22-10= 73-10= 32-10= 71-60= 26-12= 42-11=姓名________班级________用时________得分________ 20-10= 85-24= 47-13= 82-11= 70-40= 46-24= 82-51= 85-60= 81-60= 45-12= 84-23= 20-10= 67-33= 75-60= 74-13= 53-10= 35-24= 24-11= 27-11= 34-11= 53-11= 25-10= 26-11= 86-24= 27-11= 31-10= 86-25= 55-31= 66-53= 20-10= 74-41= 66-41= 74-52= 85-31= 32-20= 42-11= 50-40= 62-50= 60-50= 86-31= 66-54= 44-31= 20-10= 86-70= 56-41= 70-10= 75-60= 54-13= 82-70= 32-10= 63-42= 65-13= 34-12= 70-10= 51-10= 26-11= 85-74= 60-40= 57-30= 22-10= 83-70= 65-41= 25-11= 22-10= 32-20= 86-50= 87-63= 42-20= 27-11= 44-23= 80-30= 33-11= 74-22= 60-10= 32-11= 31-10= 53-40= 85-30= 83-30= 70-20= 26-11= 25-13= 80-30= 64-43= 85-20= 24-13= 85-74= 60-20= 20-10= 61-40= 30-20= 40-20= 20-10= 65-23= 46-32= 60-20= 77-41= 84-40= 34-13= 45-30=姓名________班级________用时________得分________ 66-31= 30-10= 57-14= 83-10= 51-20= 41-20= 32-20= 20-10= 80-40= 73-51= 42-10= 81-40= 30-10= 76-61= 81-20= 83-40= 51-20= 21-10= 71-40= 71-10= 71-30= 52-31= 33-21= 76-10= 23-11= 34-12= 40-30= 31-10= 47-25= 75-20= 62-21= 57-24= 87-31= 87-16= 40-20= 47-31= 45-14= 71-40= 43-10= 31-10= 36-22= 81-30= 72-60= 82-71= 76-35= 31-20= 24-12= 22-11= 63-50= 54-12= 51-20= 56-43= 56-22= 55-34= 74-20= 86-70= 55-14= 53-22= 53-20= 47-35= 37-10= 86-30= 40-20= 83-12= 55-31= 35-24= 83-52= 87-50= 67-15= 76-35= 63-10= 51-40= 83-72= 62-20= 22-11= 70-30= 66-51= 83-40= 53-32= 84-13= 20-10= 63-10= 62-20= 33-22= 82-20= 55-21= 84-63= 85-52= 67-44= 41-20= 74-23= 27-11= 62-40= 85-60= 37-25= 44-11= 64-50= 82-10= 77-14= 47-20=姓名________班级________用时________得分________ 87-62= 42-10= 80-50= 72-51= 35-11= 56-30= 83-31= 37-22= 61-10= 25-10= 66-24= 32-11= 76-20= 87-71= 23-11= 71-20= 31-10= 77-66= 40-30= 65-21= 45-14= 40-10= 77-15= 30-10= 81-50= 72-21= 50-30= 20-10= 50-20= 76-45= 24-10= 44-21= 27-14= 41-10= 57-22= 26-12= 75-23= 66-24= 34-10= 31-10= 25-11= 36-15= 46-15= 24-11= 23-12= 85-71= 60-20= 83-42= 26-13= 34-13= 44-31= 34-23= 66-21= 63-20= 22-10= 76-24= 86-30= 21-10= 27-16= 86-70= 87-63= 57-21= 66-20= 21-10= 73-22= 27-15= 81-20= 77-60= 74-22= 61-30= 23-12= 56-32= 83-61= 62-50= 75-14= 35-12= 56-42= 82-10= 61-10= 37-25= 26-14= 47-21= 67-14= 60-10= 66-10= 55-14= 65-10= 55-30= 66-45= 77-53= 72-20= 50-30= 31-20= 31-10= 83-31= 43-22= 85-43= 56-40= 51-10= 52-30=姓名________班级________用时________得分________ 31-10= 63-50= 25-11= 87-62= 62-41= 66-31= 34-10= 55-24= 22-11= 36-21= 56-32= 35-24= 76-23= 51-20= 51-40= 32-10= 43-12= 25-10= 70-30= 76-43= 83-50= 46-33= 36-11= 27-10= 74-33= 41-20= 34-11= 61-10= 66-25= 64-11= 67-40= 57-26= 82-10= 73-60= 23-12= 61-50= 26-10= 83-72= 33-11= 34-10= 27-13= 44-32= 26-15= 45-13= 82-61= 64-43= 42-10= 74-53= 31-10= 42-11= 56-10= 56-31= 30-20= 31-20= 64-11= 31-20= 56-40= 52-40= 41-10= 25-11= 75-20= 44-22= 45-22= 50-20= 20-10= 62-30= 34-10= 45-20= 70-40= 47-14= 50-20= 44-10= 70-60= 80-60= 76-32= 52-20= 31-10= 20-10= 62-51= 71-30= 76-42= 55-32= 57-45= 51-40= 57-36= 31-10= 84-41= 30-20= 61-40= 70-50= 33-20= 47-23= 25-11= 53-22= 34-11= 77-41= 77-36= 20-10= 35-23= 56-20=姓名________班级________用时________得分________ 63-30= 43-21= 22-11= 21-10= 44-20= 52-20= 72-40= 61-30= 75-43= 56-24= 55-13= 57-32= 77-64= 55-41= 22-11= 85-54= 77-15= 85-53= 62-31= 45-34= 32-11= 87-26= 66-24= 75-60= 46-20= 77-64= 62-21= 20-10= 71-50= 70-10= 57-32= 51-30= 61-10= 36-21= 65-13= 71-30= 36-21= 40-10= 32-11= 21-10= 52-20= 72-41= 33-12= 63-11= 72-10= 44-11= 31-20= 32-21= 67-13= 55-10= 33-11= 35-14= 75-51= 34-11= 50-10= 66-42= 45-32= 35-22= 84-11= 47-14= 33-11= 46-22= 86-63= 21-10= 23-11= 73-42= 25-11= 34-22= 71-40= 25-14= 26-11= 30-20= 26-15= 57-44= 20-10= 44-21= 74-10= 44-21= 64-41= 61-50= 67-35= 84-23= 71-40= 43-12= 21-10= 87-64= 60-50= 26-10= 56-23= 51-40= 57-34= 57-10= 22-10= 55-20= 36-22= 86-32= 86-31= 80-70= 64-41= 66-34=姓名________班级________用时________得分________ 84-50= 80-70= 21-10= 33-11= 84-63= 77-60= 41-20= 34-20= 37-16= 22-10= 44-10= 74-43= 76-23= 76-33= 25-12= 51-10= 22-10= 71-10= 37-10= 33-20= 51-20= 21-10= 60-30= 62-40= 21-10= 83-60= 23-11= 45-21= 87-10= 71-60= 62-10= 73-11= 26-13= 87-30= 56-30= 34-21= 31-20= 52-10= 77-62= 51-30= 76-14= 70-30= 77-66= 50-30= 75-10= 42-10= 57-32= 25-12= 70-50= 74-42= 66-55= 62-30= 84-72= 65-33= 20-10= 32-11= 22-11= 86-22= 66-25= 70-20= 22-10= 25-14= 80-20= 24-11= 71-50= 42-11= 46-31= 51-30= 24-13= 52-10= 27-11= 46-20= 57-34= 26-15= 20-10= 76-53= 26-11= 75-53= 35-10= 65-23= 33-22= 44-21= 77-65= 31-20= 35-12= 52-30= 51-10= 85-34= 77-46= 44-12= 55-34= 47-23= 21-10= 25-10= 66-24= 80-60= 76-63= 84-13= 66-34= 72-31=姓名________班级________用时________得分________ 21-10= 37-11= 44-22= 70-50= 26-15= 34-10= 61-20= 41-10= 86-44= 87-60= 31-10= 57-32= 65-21= 46-12= 50-40= 72-50= 64-53= 53-40= 83-51= 27-13= 55-30= 72-50= 65-42= 74-51= 50-40= 80-30= 51-40= 86-13= 84-61= 42-31= 31-10= 32-10= 62-50= 61-10= 47-35= 27-14= 21-10= 23-12= 64-43= 86-12= 76-10= 51-40= 34-21= 41-30= 61-20= 66-41= 24-10= 46-35= 84-73= 87-23= 35-24= 50-10= 80-50= 66-44= 50-10= 36-21= 67-10= 31-10= 70-20= 43-11= 80-70= 31-20= 30-10= 23-10= 21-10= 27-11= 85-62= 81-30= 76-22= 62-20= 40-20= 20-10= 55-13= 30-20= 76-30= 77-23= 64-31= 67-40= 23-12= 76-60= 74-41= 41-10= 66-52= 21-10= 57-24= 23-12= 63-50= 36-11= 63-50= 52-41= 70-10= 40-10= 21-10= 30-20= 31-20= 54-23= 85-72= 40-20= 24-11= 63-50=姓名________班级________用时________得分________ 40-20= 57-36= 32-10= 61-10= 36-14= 70-60= 55-30= 42-30= 56-40= 84-31= 22-10= 72-50= 20-10= 61-30= 54-40= 74-40= 73-40= 50-20= 33-21= 23-10= 81-60= 44-22= 84-11= 83-21= 77-35= 46-15= 41-10= 67-33= 77-62= 41-10= 86-14= 22-11= 36-20= 21-10= 22-11= 54-42= 40-30= 76-21= 53-10= 36-12= 83-22= 55-21= 37-26= 36-14= 73-12= 33-21= 47-26= 42-31= 26-13= 24-11= 50-10= 33-10= 30-20= 32-21= 72-21= 53-30= 31-20= 57-26= 36-12= 84-52= 41-10= 80-20= 50-10= 71-10= 84-70= 47-12= 37-11= 81-50= 31-10= 35-13= 71-40= 66-11= 56-12= 71-10= 45-20= 23-10= 87-42= 40-20= 81-10= 43-11= 73-52= 25-13= 72-11= 86-33= 33-10= 86-14= 60-50= 20-10= 74-51= 37-15= 81-40= 26-13= 55-23= 42-10= 46-20= 36-20= 45-31= 54-40= 72-40= 63-40=姓名________班级________用时________得分________ 30-20= 65-31= 56-34= 27-16= 42-21= 57-26= 71-10= 25-10= 77-22= 53-20= 53-32= 46-22= 51-10= 80-10= 51-30= 53-11= 37-23= 72-41= 72-11= 84-52= 64-41= 37-11= 82-60= 41-10= 30-10= 53-30= 86-50= 41-30= 33-21= 77-22= 30-10= 34-22= 32-11= 65-43= 43-11= 66-25= 33-11= 63-42= 33-10= 61-50= 23-11= 84-50= 32-20= 50-40= 36-22= 47-16= 54-42= 61-30= 80-50= 36-24= 81-10= 21-10= 37-24= 44-13= 80-40= 53-32= 41-20= 32-20= 22-11= 84-43= 75-31= 37-13= 50-30= 87-65= 25-10= 37-11= 83-42= 85-62= 85-43= 43-11= 27-12= 31-20= 52-20= 65-13= 27-14= 63-10= 41-10= 32-21= 75-61= 47-11= 31-20= 46-15= 70-10= 76-60= 71-30= 42-30= 83-10= 45-10= 65-10= 57-22= 80-50= 33-10= 81-40= 64-33= 51-30= 60-20= 27-13= 40-30= 70-10= 31-10=姓名________班级________用时________得分________ 36-10= 76-23= 65-34= 76-23= 71-40= 83-40= 33-11= 87-11= 80-40= 77-52= 77-41= 54-20= 34-21= 27-10= 47-30= 50-30= 71-50= 40-10= 81-20= 82-10= 86-15= 57-32= 85-12= 71-50= 21-10= 51-20= 72-61= 36-11= 47-15= 52-20= 31-10= 34-23= 80-60= 51-10= 20-10= 30-10= 61-40= 45-32= 63-32= 86-73= 21-10= 77-43= 76-24= 41-20= 60-50= 74-30= 77-15= 83-10= 83-72= 76-11= 42-21= 20-10= 64-41= 23-12= 72-41= 50-40= 71-60= 37-24= 50-10= 30-10= 64-53= 22-10= 53-22= 87-16= 75-20= 61-50= 52-10= 23-11= 73-41= 77-54= 66-22= 20-10= 42-31= 24-12= 74-60= 42-31= 63-10= 40-20= 52-31= 85-23= 34-13= 70-30= 41-20= 65-10= 83-21= 30-10= 63-32= 32-20= 53-41= 62-10= 53-31= 43-12= 31-20= 62-20= 54-21= 56-32= 41-30= 20-10= 54-12= 23-11=姓名________班级________用时________得分________ 71-10= 32-20= 80-60= 80-60= 50-40= 21-10= 51-40= 71-10= 72-60= 57-14= 20-10= 51-10= 25-12= 63-12= 45-21= 35-22= 35-23= 60-40= 83-42= 66-42= 46-23= 32-21= 64-53= 76-10= 73-30= 60-30= 33-21= 26-12= 55-22= 60-50= 72-51= 40-20= 27-10= 63-12= 41-10= 73-60= 51-20= 76-21= 60-40= 34-23= 37-22= 87-44= 55-21= 83-12= 73-32= 86-30= 42-11= 52-31= 41-10= 34-12= 72-11= 56-33= 30-10= 32-11= 56-12= 75-20= 64-40= 61-30= 26-10= 26-15= 64-20= 67-43= 52-11= 85-42= 23-10= 21-10= 31-10= 62-31= 70-10= 32-11= 65-44= 77-20= 47-22= 72-20= 85-24= 35-12= 70-50= 77-66= 36-25= 60-30= 26-12= 73-60= 30-20= 35-22= 57-16= 82-50= 37-14= 57-40= 60-20= 32-11= 24-13= 26-12= 51-20= 31-20= 53-20= 56-11= 57-22= 40-20= 53-40= 85-30=姓名________班级________用时________得分________ 72-60= 43-11= 65-33= 66-32= 20-10= 36-15= 27-10= 72-31= 87-65= 76-25= 24-12= 57-16= 36-14= 85-13= 55-20= 27-13= 31-20= 61-40= 71-50= 40-30= 72-51= 37-10= 74-10= 70-30= 75-42= 47-14= 55-20= 44-11= 45-22= 51-20= 81-30= 37-22= 41-10= 75-44= 82-70= 20-10= 26-12= 52-11= 27-10= 61-20= 47-10= 51-30= 20-10= 65-13= 26-15= 46-33= 62-50= 66-34= 67-26= 81-20= 57-13= 37-26= 46-23= 21-10= 53-30= 62-31= 62-30= 21-10= 53-11= 42-10= 54-30= 64-32= 50-10= 30-20= 42-21= 47-11= 22-10= 35-24= 60-40= 22-10= 80-10= 54-40= 73-12= 20-10= 25-13= 71-30= 35-14= 34-22= 84-30= 85-43= 35-21= 84-50= 70-40= 22-10= 55-12= 82-21= 27-13= 46-34= 65-43= 20-10= 66-43= 56-32= 30-20= 26-15= 76-30= 27-13= 46-34= 61-30= 84-41= 23-12=姓名________班级________用时________得分________ 70-60= 42-10= 54-20= 84-40= 43-10= 34-11= 86-14= 61-20= 26-12= 65-13= 23-10= 43-21= 77-23= 50-10= 26-14= 63-20= 23-10= 50-20= 34-21= 81-60= 74-21= 72-10= 50-40= 37-15= 54-20= 21-10= 50-30= 74-60= 81-50= 64-13= 72-20= 32-20= 82-71= 42-20= 82-51= 50-20= 27-11= 33-10= 57-15= 55-24= 43-10= 80-40= 27-15= 36-25= 26-10= 66-50= 20-10= 65-54= 65-41= 73-60= 36-14= 84-22= 35-21= 27-10= 76-62= 71-10= 85-64= 46-30= 67-46= 25-10= 27-16= 63-40= 27-15= 31-20= 32-20= 51-20= 26-14= 62-51= 85-40= 74-30= 27-11= 22-10= 76-61= 21-10= 46-23= 77-22= 31-10= 72-50= 71-20= 34-10= 72-30= 46-10= 60-50= 51-20= 62-30= 60-40= 84-50= 20-10= 45-21= 32-10= 42-11= 82-71= 36-12= 47-23= 31-20= 41-20= 33-22= 42-10= 73-50= 24-11=姓名________班级________用时________得分________ 36-23= 76-13= 75-40= 56-35= 27-15= 66-51= 34-20= 37-22= 82-20= 81-60= 41-20= 60-30= 73-31= 25-14= 75-12= 44-13= 40-30= 52-20= 71-60= 72-40= 41-30= 87-23= 76-14= 71-20= 26-11= 22-11= 66-33= 22-10= 35-13= 67-24= 77-35= 74-12= 72-31= 86-74= 21-10= 77-23= 44-30= 82-40= 84-22= 74-63= 62-51= 34-20= 80-20= 25-11= 32-10= 62-50= 46-20= 65-52= 47-20= 81-60= 25-13= 55-11= 81-20= 42-21= 67-46= 31-20= 73-30= 54-31= 55-22= 67-45= 82-40= 22-10= 21-10= 72-40= 35-12= 80-40= 77-34= 86-52= 86-24= 77-11= 62-30= 45-30= 35-10= 70-60= 22-11= 46-31= 32-11= 41-30= 50-20= 76-62= 67-51= 43-21= 42-20= 45-31= 20-10= 35-13= 75-10= 55-22= 33-22= 30-10= 40-10= 30-20= 25-11= 71-20= 25-13= 70-10= 75-32= 84-12= 66-23= 23-12=姓名________班级________用时________得分________ 64-31= 51-30= 72-11= 51-30= 85-43= 75-62= 32-10= 66-55= 60-10= 80-20= 32-10= 73-61= 82-21= 82-31= 50-20= 25-10= 67-54= 20-10= 35-21= 66-13= 86-35= 55-24= 52-31= 75-10= 34-22= 32-11= 71-20= 20-10= 50-30= 50-20= 24-11= 81-60= 74-12= 87-44= 42-11= 77-54= 82-30= 53-21= 51-40= 40-20= 62-20= 42-11= 36-21= 87-55= 21-10= 21-10= 74-31= 73-21= 83-11= 53-40= 40-30= 75-20= 36-24= 27-14= 67-13= 77-26= 35-11= 74-11= 71-60= 23-11= 86-23= 42-31= 21-10= 21-10= 41-30= 62-20= 65-11= 62-30= 35-21= 75-22= 76-30= 84-62= 56-43= 70-40= 75-13= 52-31= 57-40= 64-50= 63-10= 82-31= 80-60= 84-10= 77-40= 72-60= 22-11= 32-20= 67-42= 85-64= 82-30= 56-40= 35-21= 67-36= 27-16= 46-30= 37-26= 65-43= 34-13= 52-11= 87-51= 80-10=姓名________班级________用时________得分________ 75-13= 20-10= 50-30= 77-34= 37-26= 57-40= 71-20= 20-10= 43-31= 61-10= 37-14= 32-21= 31-20= 73-31= 23-12= 64-33= 76-45= 31-20= 25-11= 26-10= 87-61= 64-12= 33-10= 44-13= 26-11= 72-50= 63-51= 71-50= 31-10= 60-10= 83-30= 70-50= 84-63= 65-24= 23-10= 61-40= 66-13= 52-10= 50-10= 20-10= 62-20= 87-43= 52-40= 55-30= 25-13= 77-14= 52-31= 72-41= 85-62= 36-12= 63-12= 46-31= 26-15= 44-31= 50-10= 73-10= 86-62= 26-11= 82-70= 73-62= 43-30= 26-12= 36-14= 30-10= 26-14= 23-10= 60-30= 51-20= 46-15= 24-13= 37-16= 83-62= 67-24= 32-11= 64-53= 40-20= 75-11= 33-22= 50-30= 71-10= 86-33= 30-20= 83-61= 62-40= 46-10= 25-10= 44-33= 34-20= 77-16= 86-73= 42-10= 33-11= 25-11= 26-10= 25-13= 24-11= 50-40= 57-22= 20-10= 53-31=姓名________班级________用时________得分________ 33-11= 47-20= 67-44= 80-30= 24-10= 62-31= 51-20= 57-16= 26-11= 80-10= 63-41= 63-41= 54-21= 72-50= 45-31= 51-40= 31-20= 77-63= 32-11= 77-55= 70-40= 57-16= 22-11= 71-60= 47-13= 45-23= 73-52= 61-50= 57-32= 86-72= 80-40= 64-11= 86-65= 40-20= 21-10= 83-60= 37-21= 46-35= 80-70= 83-52= 55-44= 32-11= 34-20= 25-14= 55-31= 61-40= 41-10= 54-30= 66-35= 84-11= 26-12= 80-70= 44-10= 87-42= 77-62= 43-12= 76-10= 85-64= 77-50= 24-11= 45-20= 87-51= 44-12= 24-10= 33-12= 24-12= 82-30= 42-31= 63-10= 82-11= 27-11= 56-11= 46-20= 87-31= 46-13= 36-20= 36-14= 64-20= 50-20= 60-20= 47-34= 25-12= 32-20= 57-23= 45-31= 75-41= 80-50= 63-11= 65-12= 50-30= 31-10= 37-22= 85-63= 20-10= 37-15= 82-70= 36-20= 61-30= 50-10= 42-20=姓名________班级________用时________得分________ 65-23= 34-23= 21-10= 80-70= 44-12= 50-10= 24-13= 26-11= 44-13= 30-20= 86-65= 83-30= 47-36= 37-26= 27-11= 30-20= 41-30= 20-10= 33-12= 37-12= 87-35= 80-20= 80-40= 84-12= 82-30= 72-10= 71-40= 56-43= 80-60= 57-35= 33-22= 53-42= 80-40= 37-26= 85-13= 87-16= 20-10= 57-14= 76-52= 75-51= 87-66= 43-32= 47-26= 74-32= 50-40= 44-21= 76-24= 77-34= 32-10= 54-40= 73-21= 80-70= 70-10= 86-30= 24-13= 52-10= 33-20= 31-10= 71-10= 82-70= 37-22= 27-12= 22-11= 82-61= 71-60= 56-30= 36-21= 55-11= 41-30= 44-20= 73-31= 80-40= 37-26= 87-74= 66-30= 30-20= 33-12= 43-10= 64-53= 33-21= 51-40= 86-55= 85-13= 41-30= 73-12= 24-11= 26-12= 56-24= 86-43= 64-41= 31-20= 75-62= 30-20= 70-50= 67-20= 73-31= 33-11= 22-10= 27-10= 76-20=姓名________班级________用时________得分________ 70-20= 85-70= 55-31= 27-15= 87-44= 86-70= 46-30= 73-21= 60-30= 77-51= 22-10= 70-60= 23-10= 44-13= 40-20= 70-20= 34-20= 47-35= 70-40= 47-24= 34-11= 36-12= 46-10= 50-20= 42-10= 42-11= 74-32= 80-20= 36-11= 26-12= 76-20= 51-40= 80-10= 27-16= 62-21= 73-31= 42-11= 86-41= 30-20= 31-10= 76-62= 27-15= 76-10= 23-12= 74-51= 35-11= 42-30= 60-50= 45-31= 51-20= 54-13= 53-42= 31-10= 56-20= 33-21= 33-22= 27-14= 54-32= 63-32= 67-55= 61-30= 71-10= 42-10= 44-32= 71-40= 82-10= 22-10= 37-12= 42-31= 71-60= 76-54= 64-40= 40-10= 53-30= 57-33= 52-30= 55-34= 83-22= 76-42= 65-34= 67-53= 36-15= 53-40= 25-10= 27-15= 55-41= 62-40= 31-20= 77-63= 55-21= 74-63= 73-10= 84-72= 27-16= 56-22= 45-32= 41-20= 86-65= 66-10= 56-24=姓名________班级________用时________得分________ 53-11= 51-20= 26-15= 37-25= 54-10= 40-30= 61-40= 83-40= 30-10= 46-22= 77-20= 81-20= 72-50= 56-31= 20-10= 37-22= 60-20= 27-11= 85-34= 85-34= 32-10= 53-22= 46-25= 42-11= 46-20= 86-41= 54-12= 72-61= 30-20= 55-42= 80-20= 34-10= 51-40= 25-14= 30-10= 44-22= 21-10= 65-32= 76-41= 31-10= 50-20= 47-23= 34-21= 34-23= 57-34= 43-20= 60-50= 76-12= 82-40= 51-20= 64-42= 75-23= 24-10= 84-30= 45-31= 55-24= 30-10= 84-42= 43-20= 77-15= 20-10= 65-53= 27-15= 56-11= 55-22= 77-25= 60-50= 80-70= 55-42= 74-41= 66-31= 57-15= 46-11= 57-43= 21-10= 44-32= 76-43= 86-32= 20-10= 61-50= 26-15= 31-20= 56-12= 23-11= 62-21= 46-23= 45-32= 44-22= 35-20= 46-10= 20-10= 33-21= 80-30= 37-25= 43-10= 35-12= 32-21= 36-22= 57-34= 52-41=姓名________班级________用时________得分________ 43-30= 72-11= 40-20= 47-31= 70-30= 42-10= 80-10= 64-50= 41-10= 51-40= 21-10= 46-31= 77-32= 35-21= 55-42= 23-11= 54-11= 25-14= 71-30= 53-31= 86-20= 62-31= 27-11= 56-44= 71-20= 85-14= 34-11= 46-20= 85-50= 46-20= 76-61= 85-23= 73-21= 33-20= 85-64= 56-35= 73-52= 53-32= 21-10= 70-60= 83-20= 32-11= 30-10= 87-76= 40-20= 85-61= 83-52= 42-21= 77-31= 25-11= 21-10= 60-10= 67-43= 36-22= 44-32= 40-10= 46-23= 72-61= 33-11= 80-70= 71-40= 33-21= 75-11= 26-14= 51-10= 67-24= 33-12= 71-50= 67-40= 65-43= 87-43= 85-52= 82-40= 33-21= 42-10= 53-31= 67-45= 86-61= 60-20= 80-30= 64-23= 85-53= 73-21= 30-10= 44-23= 32-20= 75-61= 65-21= 76-15= 83-40= 72-41= 70-60= 80-70= 56-35= 82-30= 37-10= 84-60= 46-30= 87-43= 71-20=姓名________班级________用时________得分________ 84-51= 71-60= 56-25= 67-42= 67-20= 55-41= 83-42= 60-40= 50-30= 71-60= 43-30= 76-10= 86-60= 22-10= 56-30= 23-10= 73-40= 63-30= 27-14= 25-12= 22-11= 61-30= 74-42= 44-10= 63-52= 70-60= 23-10= 31-20= 81-70= 81-50= 73-12= 35-10= 61-30= 34-20= 27-16= 25-10= 52-21= 73-20= 40-20= 55-31= 72-50= 44-20= 51-30= 41-20= 82-10= 20-10= 24-10= 33-11= 21-10= 63-41= 33-10= 66-23= 21-10= 20-10= 76-35= 24-13= 27-11= 65-31= 35-22= 73-21= 23-11= 71-30= 30-10= 22-11= 34-23= 66-43= 41-30= 57-13= 36-23= 74-40= 56-30= 63-31= 85-43= 31-20= 40-10= 83-20= 51-40= 64-12= 70-40= 23-12= 45-33= 66-12= 80-10= 63-41= 81-70= 57-10= 47-32= 47-13= 30-20= 80-40= 52-31= 27-10= 52-40= 87-41= 20-10= 50-10= 23-10= 27-11= 35-14= 74-21=姓名________班级________用时________得分________ 23-10= 44-22= 64-20= 25-14= 21-10= 37-13= 64-42= 36-23= 72-60= 21-10= 84-42= 26-12= 75-22= 37-21= 70-60= 66-12= 57-23= 56-45= 40-20= 42-21= 56-25= 57-11= 63-51= 20-10= 87-32= 27-12= 55-40= 71-30= 86-21= 31-20= 32-21= 33-12= 26-10= 32-21= 84-63= 82-40= 25-14= 80-10= 62-41= 82-60= 63-21= 25-12= 40-20= 52-30= 64-33= 55-21= 26-13= 36-15= 75-50= 87-13= 70-10= 73-30= 87-21= 55-21= 62-30= 67-10= 23-10= 43-21= 77-46= 75-20= 71-10= 55-24= 74-32= 52-21= 26-15= 63-12= 87-61= 75-31= 40-20= 27-13= 37-20= 47-26= 23-12= 76-55= 40-10= 57-15= 56-21= 75-52= 73-31= 55-24= 44-31= 50-20= 82-20= 23-12= 21-10= 30-20= 42-31= 26-10= 61-10= 84-42= 24-12= 34-11= 46-13= 65-32= 76-64= 35-20= 42-21= 42-30= 67-30= 70-30=。
信息窗二(100以内的不退位减法)-青岛五四学制版一年级数学下册教案一、教学目标1.能使用不退位减法完成100以内的两位数减法运算2.能够从生活中的实际问题中提取数学模型并解决问题3.培养学生逻辑思维和解决问题的能力二、教学重点和难点重点1.不退位减法的原理2.运算顺序的掌握难点1.对不退位减法的理解和应用2.对加减法的思维转换和运算顺序的理解三、教学过程1. 导入(5分钟)通过投影或者黑板上出示以下一道口算题:65 - 38 =请学生在黑板上进行计算,然后请一名学生将自己的答案报出来,并解释自己的计算方法。
2. 深入讲解(15分钟)1.不退位减法的原理首先,要明确什么是不退位减法。
不退位减法是指,在两位数相减时,如果相减的两个位数相同,则应该直接相减;如果被减数中的位数小于减数中的位数,则要借位,并且在下一位减数上减1。
例如,计算53-28,先将3-8不够减,因此需要向前一位借1;借出1之后,原来的第一位数5变成了4,第二位数加上10,变成13;接下来,13-8=5,因此最终结果为25。
2.运算顺序的掌握在进行加减法运算时,如果没有括号的限制,计算顺序应该是先乘除,后加减。
例如,计算2+3×4-5,先乘除后加减,2+(3×4)-5=9。
3. 实战演练(20分钟)让学生进行以下练习题:1.37 - 16 =2.99 - 88 =3.72 - 35 =4. 拓展应用(15分钟)请学生回答以下问题:1.如果一个学生有10元钱,他买了一件衣服花了7元,剩下多少钱?2.小明有8个小球,他送给小红3个,还剩下多少个?请学生将这些问题转化为数学题,并解决它们。
5. 总结(5分钟)请学生回答以下问题:1.不退位减法的原理是什么?2.在进行加减法运算时,应该先乘除后加减,为什么?3.如何将生活中的问题转化为数学问题?四、教学反思本节课主要对不退位减法进行了详细的讲解,让学生了解了这种计算方法的原理和应用。