小学二年级数学两位数的加减法

小学二年级数学口算《两位数加减两位数》教案小学二年级数学口算《两位数加减两位数》教案教材分析这部分内容主要教学口算加减法，包括两位数加减法，整百、整千数加减法，几百几十加减法（不进位、不退位）、几百几十加减法（进位、退位）等，是继第二册“100以内口算加减法”之后的又一阶段性教学内容．学生学习笔算要理解算理，需要有一定的口算基础，特别需要有整十、整百、整千的口算作基础．因此理解算理，掌握口算方法十分重要，是本单元的教学重点．教学难点在于进位加法和退位减法．口算的方法可以有很多种，但是教材并不限于教给学生一般的口算方法．教材在每道例题下面都安排了“你还能想出别的算法吗？”这样的思考问题，提示学生灵活地思考其他方法，这样有利于培养学生类推能力．教法建议教学时以旧引新，复习20以内的加减法以及数的组成．教学口算方法时，不仅要引导学生理解教材中介绍的'口算方法，还要鼓励学生多角度去思考其他方法．对于学生说出的其他口算方法，只要正确、合理，教师都应给予鼓励，不要强求一致．让学生选择自己喜欢或习惯的方法来算，给学生留出思维空间．教学时要安排一定的时间让学生说自己的口算思路，说明口算步骤，计算后引导学生说出每组题的相同地方和不同地方．这部分内容比较容易掌握，但由于数目大了，算得又对又快不是很容易．因此设计练习时首先要求口算正确，以后逐步要求．教学设计示例课题：口算两位数加、减两位数教学目标1．使学生初步掌握两位数加、减两位数的口算方法，能正确地进行口算．2．初步培养学生思维的灵活性和类推能力．3．初步培养学生良好的学习习惯和独立的思考的精神．教学重点、难点理解两位数加、减两位数的口算的算理，掌握口算的方法．教具、学具口算卡片、电脑课件教学过程一、复习旧知1．用两位数加、减整十数或一位数．26＋30 48＋20 49－20 56＋3 28－92．连加、连减．52＋30＋7 57－30－555＋30＋6 75－40－872＋10＋7 86－20－73．在□里填上适当的数．二、学习新知（一）教师谈话两位数加、减两位数的习题，我们已经学过笔算的方法，今天，们要学习口算，比一比看谁算得又对又快．（二）学习例1．1．出示例1 64＋25教师提问：不用竖式计算谁能很快算出结果？学生讨论后纷纷发表自己的见解．2．演示课件“口算两位数加、减两位数”：下载方法一．把64分成6和4，把35分成30和5，然后两位数加两位数，一位数加一位数，得数是89．方法二．把25分成20和5，64加0等于84，再加上5，等于89．方法三．把64分成60和4，60加上25等于85，再加上4等于89．方法四．把25分成20和5，64先加上5等于69，69加上20等于89．3．教师引导学生观察、总结．上面几种算法都是正确的．哪种算法最适合自己就可以用哪种方法，自己最理解的方法就是最好的方法．需要注意的是记住先进行计算的结果，再进行第二步计算．4．练一练先独立写出结果，再在小组内交流自己的计算方法．28＋37 34＋32 36＋42 37＋2532＋46 54＋38 45＋19 15＋65完成上面练习后重点交流28＋37的算法．28＋37＝65 把28假设成30加上37（30＋37－2＝65）后再把多加的2减去．（三）学习例21．出示例2 58－26＝ 72－49＝第一题分小组后交流算的方法，重点研究第二题72－49的计算方法．（1）学生尝试做．（2）学生汇报解题的方法．继续演示课件“口算两位数加、减两位数”：下载A．72－49＝23 B．72－49＝23想：72－40＝32 想：72－50＝2232－9＝23 22＋1＝23C．72－49＝23 D．72－49＝23想：72－9＝63 想：12－9＝363－40＝23 20＋3＝232．观察对比58－26和72－49两题有什么不同？（订正：58－26是不退位减法，72－49是退位减法．）3．练一练．36－20＝ 52－10＝ 34－23＝ 98－76＝36－24＝ 52－18＝ 90－25＝ 42－39＝三、巩固练习1．基本练习（1）口算．（全班学生动笔做，订正后，说一说每组两题有什么关系？）15＋30＋4 25＋40＋8 39－20－615＋34 25＋48 39－26（2）卡片练习24＋15 37＋26 83＋1724＋42 44＋39 72＋3624－12 47－29 50－3786－44 85－37 100－3354＋28 31－18 56－3774－16 76＋23 35＋243．在□里填上适当的数，再说一说是怎样算的．4．计算下面各题．（1）一个加数是36，另一个加数是24，和是多少？（2）被减数是57，减数是38，差是多少？5．下面各题要在两分钟内完成．35＋24 62＋18 72－2575－28 35＋40 28＋5464＋30 72＋15 81－3772－18 72－15 27＋15四、全课小结在进行两位数加两位数，两位数减两位数时，方法是多种多样的，只要自己认为好的就是最佳的计算方法．计算时要细心认真．五、布置课外作业1．口算下面各题．34＋15 27－20 71－45 64－1526＋17 81－60 83－19 75－2538－19 39－20 24－17 31－152．上面或下的纸条每移动一格，口算出上下两个数的和、差各是多少．3．供学有余力的学生完成．（扩展题）（）＋34＝70 400－（）＝320（）＋53＝86 87－（）＝50（）＋72＝90 63－（）＝17板书设计口算两位数加、减两位数例1 64＋25＝89 例2 72－49＝23A想：60＋20＝80 A想：72－40＝324＋5＝9 32－9＝2380＋9＝89B想：64＋20＝84 B想：72－9＝6384＋5＝89 63－40＝2328＋37＝65 58－26＝32想：28＋7＝35 想：58－20＝3835＋30＝65 38－6＝32。

小学二年级100以内两位数加减法连加连减练习题1200道(直接打印)两位数加减法练习题(一)学校:___________班级：_________姓名:___________时间:________74–29+46=43+38–24=55+19–57=64–17+37=70–41+48=72–16–18=71–19–35=98–79+49=29+12–16=64–17+37=98–79+49=29+12–16=26+65–35=70–11+25=61–35+57=64–26+43=33–19+48=86–47+44=37+39–58=39+14+28=52–29+38=23+19–26=24+68–53=16+49–48=81–44+27=47+44–57=38+17+19= 80–23+37= 45+28–44= 44+18–45= 31–13+59= 35+29+17= 60–25+59= 50–23+48= 42–17+29= 86–69+58= 47+25–24= 25+58–25= 64–26+45= 29+43–37= 24+58–55= 51–32+56= 96–77+16= 49+18–28= 39+37+16= 86–57+46=46+25–27= 97–18+12= 62–45+27= 75–58+49= 58+35–44= 72–57+36= 68+24–69= 95–46+25= 46+15–26= 68–39+14= 92–63+45= 55+39–78= 46–18+14= 32+59–24= 67+19–19= 70–32+18= 86–47+48= 72–44+53= 25+68–27= 53–17+26=16+79–69=60–25+59=72–57+36=64–26+43=33–19+48=57+27–35=52–29+38=37+39–58=55+39–78=23+19–26=97–39+29=67+19–19=81–44+27=47+44–57=72–44+53=35+39+19=68–49+16=68–39+18=两位数加减法练习题(二)学校:___________班级：_________姓名:___________时间:________53–19+29=35+19–38=95–57+37=96–67+35=71–58+78=52–19+58=32+49–43=80–57+59=32–14+44=49+34–19=47+36–36=32–14+44=37+24–27=15+67–27=18+55–54=84–47+17=73–45+35=65–47+55=50–19–19=90–15–39=38+19+25=49+47–78=82–64+15=92–43+42=37+34–29=72–55+65=90–27–26=47+36–39=17+17+29=28+67–66= 28+16+48= 28+48–59= 54–35+46= 67+24–12= 64+27–58= 39+45–68= 14+59–25= 94–38+36= 92–66+26= 37–19+54= 59+33–44= 72–17+37= 80–16–17= 67–29+38= 41–22+27= 47+46–38= 94–59+29= 18+55–58= 35+27–43=37+34–25= 46+36–65= 14+67–56= 95–59+26= 91–35+36= 63–44+27= 86–49+54= 64+18–27= 51–22+49= 82–54+17= 28+36–48= 63+18–56= 87–68+58= 97–29+24= 24+18–27= 65–47+58= 47+24–53= 37+34–25= 15+67–27= 84–47+17=14+77–54=65–47+55=90–15–39=39+45–68=38+19+25=19+72–66=82–54+17=82–64+15=63+18–56=37+34–29=83–19–18=47+46–38=28+67–66=24+18–27=91–59–16=两位数加减法练习题(三)学校:___________班级：_________姓名:___________时间:________46+46–67=53–37+65=13+39+29=70–45+26=83–57+48=75–58+67=43+28–16=36+27+19=69+12–43=84–35+35=36+27+19=69+12–43=45–29+59=54+37–38= 62–36+19= 29+34–27= 56–28+53= 57+15–38= 57–19+19= 95–57+36= 50–24+25= 33–17+65= 40–12+16= 94–56+49= 82–29–25= 18+65–35= 18+55–37= 14+77–37= 27+18–19= 28+28–17= 69+27–18= 45+39–57= 50–17+28=64–17+35= 72–48+28= 43–16+25= 71–54+25= 79+15–48= 57+16–24= 37+27–47= 31–14+35= 47+46–17= 70–42+45= 53–37+45= 50–14+18= 85–29+38= 75–26+35= 58+13–28= 82–63+24= 25+46–29= 35+27–48= 72–38+29= 36+58–38=92–34–39= 94–37+39= 38+18–28= 84–19–48= 81–19–35= 53+28–26= 80–44+56= 84–55+38= 76–49+19= 57–38+29= 68+15–39= 17+65–64= 38+53–12= 62–36+19= 45–29+59= 91–48+19= 57+15–38= 29+34–27= 71–54+25= 38+18–28=56–29+47=33–17+65=53+28–26=40–12+16=82–29–25=72–17–16=18+55–37=85–29+38=28+28–17=68+15–39=28+67–46=两位数加减法操演题(四)黉舍:___________班级：_________姓名:___________工夫:________82–47+58=14+47–14=91–23+25=35–17+29=67+24–66=35–17+29=24+28–33=86–38+43=78–59+59=94–69+36=72–35+49=24+28–33=86–38+43=45+19–39=29+44–34=52–17+49=90–51+15=51–23+25= 90–38+29= 80–53+57= 68–49+16= 96–59+57= 75–28–29= 83–14+25= 94–38+19= 94–48+17= 27+46–56= 50–16–15= 35+47–26= 61–43+68= 64–17+14= 17+48+27= 78–29+36= 45–16+52= 34+58–75= 75+16–38= 90–16–16=82–28–27= 68–39+18= 76+15–15= 52–16+55= 39+55–49= 92–63+49= 83–65+68= 13+59–36= 39+42–63= 35+37–28= 16+59–49= 64–39+28= 45–29+38= 90–61+13= 53–15+33= 85–18–48= 73+18–54= 83–15+19= 39+47–38= 39+42–62=66–29+48= 24+68–56= 74–37+57= 29+53–38= 64–26+48= 90–25–49= 52+19–15= 29+13–17= 17+37–36= 64–17+14= 46+16–23= 90–51+15= 90–61+13= 51–23+25= 83–15+19= 49+45–68= 74–29+46= 96–59+57= 24+68–56= 57+37–36=83–14+25=27+46–56=94–38+19=39+42–63=93–48+47=61–43+68=94–79+36=两位数加减法操演题(五)学校:___________班级：_________姓名:___________时间:________81–54+28=50–32+59=16+27+38=16+59–49=94–79+36=77+18–46=86–17+26=77+18–46=80–54+58=82–29–28=80–31+44=67+16–35=58+13–32=47+34–35=18+65–39=16+68–55=28+27+26=18+43–49=82–38+28=68+16–36=72–26+19=34–18+26= 53+18–18= 91–72+79= 29+22–18= 60–17+28= 24+37–36= 49+36–67= 76–58+23= 17+67–58= 42–23+52= 18+75–37= 12+19–15= 94–57+46= 92–54+17= 23+69–75= 53–26+56= 92–19–47= 13+68–65= 97–48+33= 81–66+17=46–27+19= 36+46–29= 17+36+39= 58+35–18= 17+16–15= 39+34–56= 13+38–15= 41–25+68= 62–34+13= 62–24+14= 75–47+56= 45+27–46= 52–16+58= 24+67–59= 42–14+48= 64–48+35= 48+43–34= 93–47+49= 70–19–38= 37+44–12=94–78+39= 90–65+69= 72–57+39= 83–69+19= 62–23+17= 58+13–32= 16+68–55= 47+34–35= 92–54+17= 45+17–48= 68+16–36= 18+43–49= 64–48+35= 72–26+19= 28+45–59= 46–27+19= 37+44–12= 29+22–18= 24+37–36= 35+46–58=49+36–67=62–23+17=17+67–58=两位数加减法练习题(六)学校:___________班级：_________姓名:___________时间:________67+15–58=47+45–44=42+19–17=91–14+18=91–14+18=86–29+36=27+57–67=37+44–33=77+17–69=93–17–47=74–55+14=17+38+19=17+38+19=82–69+69=29+25–28=73–54+43=35+36–53=56+27–59=40–11+36=26+65–32=26+55–33=37–19+58=54–27+18=68+24–66=15+46–13=83–49+17= 90–77+78= 95–36+17= 72–25+44= 18+63–65= 29+35–26= 98–79+45= 81–66+39= 72–35+47= 55+37–15= 50–13+47= 18+77–49= 83–49–15= 86–59+56= 18+47–26= 18+24–13= 68+14–67= 67–19+43= 65–38+27= 52–33+15=62+29–79= 36+45–52= 57+18–27= 68+24–64= 98–69+47= 75+19–15= 24+49–44= 39+37–37= 45–28+65= 90–73+25= 76–48+18= 95–46+22= 68–29+12= 61–28–15= 14+69–26= 90–73+27= 92–76+27= 81–24+25= 95–27+19= 76–57+46=48–19+46=29+25–28=29+35–26=95–68+34=23+39–46=55+37–15=76–48+18=26+55–33=40–11+36=38+19+29=61–28–15=54–27+18=15+46–13=83–49+17=19+72–69=72–25+44=36+45–52=19+73–63=14+47–36=两位数加减法练习题(七)黉舍:___________班级：_________姓名:___________工夫:________19+73–63=14+47–36=29+34–29=84–65+55=24+49–47=86–69+55=75+19–18=71–59+79=71–59+79=97–78+77=83–17+28=90–28–24=40–23+24=90–18–25=64–47+55=80–35+48=84–35+32=91–37–29=35+28–16=61–27+18=75–39+16=95–78+35=84–67+26=56+19–27=80–26–19=92–53+43=70–55+28=70–32+43=32+49–22=15+77–33= 55–36+17= 90–28–24= 51–22+48= 33–15+18= 74–49+66= 27+19+37= 53–28+37= 53+18–38= 72–45+48= 24+27–34= 29+48+15= 47+24–28= 72–27+38= 16+75–16= 52–37+69= 84–45+36= 96–67+15= 41–28+49= 94–77+64=46+37–37= 49+47–77= 29+52–62= 35+18–18= 28+27+19= 19+43–13= 18+46–29= 75–19+19= 23+49–48= 18+64–65= 97–29+27= 29+33–35= 71–32+14= 47+34–55= 84–35+38= 96–77+13= 57–38+25= 46+37–37= 90–18–25= 73–24+23=80–35+48=35+28–16=84–35+32=18+46–29=14+68–29=23+49–48=95–78+35=56+19–27=97–39+25=16+75–16=47+34–55=70–55+28=70–32+43=63–49+78=15+77–33=两位数加减法练习题(八)黉舍:___________班级：_________姓名:___________工夫:________32–14+24=18+68–19=19+78–18=94–46+47=94–46+47=51–12+28=56–38+54=12+79–79=49+27–59=64+27–37=12+79–79=49+27–59=45+49–59=72–25+47= 61–29–13= 92–23+22= 49+29+18= 61–16–27= 71–53+28= 78–59+77= 39+28–29= 57–28+49= 62–26+17= 75–38+39= 25+46–55= 13+78–79= 72–56+59= 76–57+43= 92–34+37= 83–68+68= 27+54–14= 68+15–35= 54–27+15=35–17+26= 67+14–65= 19+22–23= 49+29–39= 19+58+14= 38+55–18= 72–28–27= 26+46–25= 95–77+59= 80–65+66= 19+76–47= 24+39–45= 14+37–34= 82–58+69= 43+49–35= 76–49+15= 59+38–68= 14+37–12= 68+24–63= 24+59–49=48–29+48= 35–17+46= 46+19+28= 58+15–34= 70–53+57= 90–64+18= 90–51+32= 18+38–19= 19+12–18= 28+39–29= 26+67–18= 29+24–27= 92–44+35= 18+77–47= 68+15–35= 49+29+18= 67+14–65= 19+22–23= 18+73–66= 71–53+28=39+28–29=70–53+57=57–28+49=45–19+57=80–65+66=13+78–79=24+39–45=14+37–34=46+27–35=27+49–57=36+25–24=两位数加减法操演题(九)学校:___________班级：_________姓名:___________时间:________27+49–57=36+25–24=90–72+25=25+57–49=53+38–59=54–26+45=54–36+43=90–72+25=25+57–49=93–19–35=65–38+24=70–23+36=51–16+27=97–69+69=46+28–29=17+18–17=58+15–37=35+57–66= 90–73+48= 82–44+15= 91–59–15= 69+26–28= 75–17+27= 37+56–19= 64+18–33= 78–19+35= 78–29+33= 40–11+42= 93–39+39= 74–59+68= 35–16+49= 19+57+16= 41–14+17= 64–28+49= 53+39–53= 95–26+18= 49+44–16=82–54+13= 76–27+25= 84–48+19= 80–66+67= 28+58–38= 70–41+43= 79+17–18= 28+37–49= 62–44+29= 58+24–19= 75–37+54= 66–49+17= 94–68+56= 73–15+15= 64–38+48= 54–27+39= 83–16+26= 92–48+18= 25+38+18= 91–49–16=60–17+48= 56–39+48= 66+25–15= 38+38–59= 71–18–37= 26+65–38= 50–35+37= 59+34–18= 92–67+28= 97–69+69= 41–14+17= 58+15–37= 73–15+15= 68–29+33= 92–48+18= 90–73+48= 53–19+29= 75–17+27= 80–66+67= 64+18–33=70–41+43=90–28–27=28+37–49=62–44+29=59+34–18=93–39+39=83–36+35=两位数加减法练习题(十)黉舍:___________班级：_________姓名:___________工夫:________55+39–79=56+36–63=64–47+59=64–25+46=58+34–47=64–25+46=39+54–76=90–24–47=90–57+59=90–24–47=94–47+44=29+52–65=80–22+37=72–26+15=47+24–27=94–37–18=23+19–29=61–14+36=18+43–45=48+33–32=31–17+37=64+28–34= 53–38+39= 37+44–37= 27+67–69= 24+67–56= 53–16+55= 42+29–19= 29+52–65= 43–14+44= 19+33–18= 86–39+37= 28+45–56= 91–59–18= 52–38+68= 90–37–34= 80–22+37= 72–49+28= 47+24–27= 28+45–56= 23+19–29=75–27+28= 75–27+28=。

二年级数学两位数加减法一、知识基础。

1. 数位的认识。

- 在两位数中，从右往左数，第一位是个位，第二位是十位。

例如，数字35，5在个位上，表示5个一；3在十位上，表示3个十。

2. 数的组成。

- 一个两位数是由几个十和几个一组成的。

比如48是由4个十和8个一组成的。

二、加法。

1. 不进位加法。

- 计算方法。

- 相同数位对齐，从个位加起。

例如计算23 + 14，先把个位上的3和4相加，3+4 = 7；再把十位上的2和1相加，2 + 1=3，所以23+14 = 37。

- 练习示例。

- 12+35 =.- 个位：2+5 = 7。

- 十位：1+3 = 4。

- 结果：47。

- 21+52 =.- 个位：1+2 = 3。

- 十位：2+5 = 7。

- 结果：73。

2. 进位加法。

- 计算方法。

- 相同数位对齐，从个位加起，个位相加满十，向十位进1。

例如计算38+25，先算个位8+5 = 13，个位满十，向十位进1，在个位写3；再算十位3+2+1（进位的1）=6，所以38 + 25=63。

- 练习示例。

- 47+26 =.- 个位：7+6 = 13，向十位进1，个位写3。

- 十位：4+2+1 = 7。

- 结果：73。

- 58+34 =.- 个位：8+4 = 12，向十位进1，个位写2。

- 十位：5+3+1 = 9。

- 结果：92。

三、减法。

1. 不退位减法。

- 计算方法。

- 相同数位对齐，从个位减起。

例如计算56 - 23，先算个位6 - 3 = 3，再算十位5 - 2 = 3，所以56 - 23 = 33。

- 练习示例。

- 78 - 45 =.- 个位：8 - 5 = 3。

- 十位：7 - 4 = 3。

- 结果：33。

- 96 - 72 =.- 个位：6 - 2 = 4。

- 十位：9 - 7 = 2。

- 结果：24。

2. 退位减法。

- 计算方法。

- 相同数位对齐，从个位减起，个位不够减，从十位退1当10，再和个位上的数合起来继续减。

数学教案：小学二年级两位数加减法一、引言在小学数学教学中，数的加减法是基础且重要的概念之一。

对于小学二年级的学生来说，掌握两位数的加减法是他们进一步深入理解和应用数字的关键。

本教案旨在帮助二年级的学生掌握两位数加减法，并培养他们良好的计算习惯和思维能力。

二、教学目标通过本节课的教学活动，学生将能够：1. 理解两位数加减法的概念与原则；2. 掌握两位数相加与相减时进位借位的方法；3. 运用所学方法正确进行两位数的加减法运算；4. 培养学生合作探究和解决问题的能力。

三、教学内容1. 从十个连续自然数开始，复习个位数字与十位数字的概念，并进行相关运算练习。

2. 引导学生观察两个十位数字相同、个位数字各不相同情况下相加与相减结果的规律，并进行实际操作演示。

3. 探索并总结个位数字不变、只有十位数字进一步增大或减小时，对结果产生什么样的影响，提示学生关注进位与借位的规律。

4. 给予学生一些例如67+9、89-17等类似的计算题目，引导他们观察和总结两位数加减法中进位与借位方法；5. 让学生运用所学方法解决一些实际问题，例如购物计算或人口统计等。

四、教学步骤1. 导入通过举例子让学生回忆起个位数字与十位数字的意义，并复习十个连续自然数之间的加减法运算。

2. 提出问题通过提问激发学生思考，例如：如果有两个两位数相加或相减时，要怎么做呢？是否有什么规律？3. 引导观察给出一个具体的两个十位数字相同、个位数字各不相同情况下的加法算式示例（如34+25），引导学生观察并进行操作演示。

再给出一个具体的减法算式示例（如45-26），引导学生观察并进行操作演示。

4. 探索规律将注意力转移到个位数字保持不变时，只有十位进一步增大或减小时可能出现什么情况。

通过多组类似问题让学生进行操作演示，引导他们观察并总结进位与借位的规律。

5. 确立方法结合前面的观察和总结，讲解进位与借位的具体方法，并通过多组例题让学生掌握应用方法的步骤。

学校:___________ 班级：_________ 姓名:___________ 时间:________ 90–68= 75–46= 61–33= 60–23= 43+48=83–57= 61–43= 36+47= 52–35= 28+16=37+35= 69+22= 15+77= 53–45= 27+48=60–46= 36+25= 36+15= 43+48= 83–57=28+16= 19+52= 18+55= 19+42= 92–59=13+29= 93–66= 93–46= 44–29= 47+24=70–12= 27+64= 92–79= 13+39= 81–19=85–67= 80–31= 13+19= 71–22= 30–16=25+66= 92–69= 39+12= 45+26= 45–16=71–32= 69+25= 46+36= 31–14= 85–57=18+65= 93–56= 84–47= 23–15= 19+52=29+54= 56–48= 70–51= 56–38= 58+13=16+39= 32+29= 33–17= 63–49= 40–28=41–25= 84–19= 18+27= 57+25= 55–28=96–47= 56+15= 25+28= 17+17= 49+14=24+18= 82–44= 42–13= 90–43= 96–67=28+67= 47–39= 90–33= 57+35= 41–15=38+53= 16+19= 63–39= 64+27= 96–57=16+29= 58+23= 29+54= 58+13= 16+39=40–28= 55–28= 49+14= 96–67= 28+67=41–15= 96–57= 75–36= 33+19= 74–26=学校:___________ 班级：_________ 姓名:___________ 时间:________ 27+64= 93–66= 31–23= 54–25= 53–37=40–22= 19+52= 22–15= 29+49= 93–56=93–34= 60–49= 28+29= 13+29= 12+19=19+42= 13+39= 45–26= 29+39= 96–19=96–29= 53–37= 93–56= 12+19= 19+42=63–36= 39+38= 98–19= 54+28= 48+36=78–59= 39+28= 86–48= 63–46= 19+45=30–19= 46+29= 47+16= 19+68= 26+69=94–69= 47+49= 80–34= 47+26= 55+38=77–49= 86–58= 93–59= 19+78= 72–35=38+18= 46+39= 50–11= 80–24= 70–48=72–13= 70–38= 18+58= 71–25= 91–84=63–26= 48+36= 19+45= 26+69= 94–69=55+38= 72–35= 70–48= 91–84= 63–26=16+67= 60–26= 53–25= 35+17= 43+38=73–64= 60–16= 28+18= 69+25= 43–18=67+17= 76+16= 64–55= 53–15= 69+15=73–54= 68+27= 45–16= 52–17= 48+45=44–28= 81–52= 80–65= 49+32= 52–27=95–87= 36–17= 60–38= 81–62= 73–64=43–18= 69+15= 48+45= 52–27= 95–87=学校:___________ 班级：_________ 姓名:___________ 时间:________ 35+27= 15+67= 82–37= 60–13= 34+39=94–85= 74–16= 57+28= 94–75= 73–38=28+16= 74–48= 26+18= 49+39= 80–62=66–27= 58+38= 14+57= 51–14= 34+29=73–28= 66–37= 81–27= 14+47= 35+17=90–58= 27+28= 82–47= 80–72= 75–36=53+18= 38+27= 19+55= 17+58= 19+45=92–39= 38+17= 26+46= 92–49= 71–12=17+48= 33+58= 46+26= 85–48= 70–15=26+66= 93–36= 85–38= 70–25= 90–74=76–39= 76–29= 77–49= 46+16= 62–26=18+35= 25+69= 26+56= 63–14= 47+14=84–28= 39+15= 45+29= 45+19= 90–64=45+39= 93–26= 18+68= 93–59= 94–46=24+59= 53+18= 19+45= 71–12= 17+48=70–15= 90–74= 62–26= 47+14= 84–28=90–64= 94–46= 55–28= 36+35= 62–19=79+17= 75–67= 40–18= 83–65= 84–75=28+57= 60–44= 47–29= 95–27= 94–17=95–37= 35+58= 35+48= 29+34= 64+27=36+55= 62–29= 55–18= 61–32= 29+44=学校:___________ 班级：_________ 姓名:___________ 时间:________ 70–58= 97–19= 70–48= 90–18= 18+68=98–29= 41–23= 71–45= 17+14= 39+48=39+38= 41–13= 15+16= 66+19= 63–46=38+28= 78–69= 46+39= 50–21= 77–59=54–38= 62–36= 61–49= 71–35= 63–56=46+49= 23+28= 23+38= 16+26= 39+15=70–58= 18+68= 39+48= 63–46= 38+28=77–59= 63–56= 39+15= 95–69= 27+69=81–57= 56+38= 49+37= 40–18= 37+56=29+67= 90–33= 29+44= 73–45= 57+35=95–59= 48–39= 57+25= 28+57= 81–34=57+16= 96–57= 59+23= 31–19= 40–28=47–29= 16+29= 56+28= 64+27= 96–47=73–36= 81–24= 80–37= 82–44= 16+19=48+17= 87–48= 80–47= 33–17= 49+27=58+13= 27+69= 37+56= 57+35= 95–59=69+22= 28+26= 29+23= 29+13= 15+77=35+37= 79+18= 27+38= 27+28= 53–45=27+48= 75–68= 83–67= 35+27= 60–46=95–28= 94–18= 95–38= 80–16= 36+25=74–58= 28+36= 52–25= 63+18= 36+15=学校:___________ 班级：_________ 姓名:___________ 时间:________ 94–65= 93–45= 44–28= 71–12= 88–19=93–78= 14+38= 71–22= 85–57= 19+64=18+54= 88–29= 88–19= 91–32= 90–55=83–44= 96–69= 90–77= 82–56= 83–34=59+12= 60–22= 58+25= 97–79= 81–46=74–35= 83–54= 74–45= 90–45= 41–27=91–65= 91–42= 15+76= 20–13= 97–89=59+35= 70–18= 60–32= 57+37= 34–26=82–66= 49+49= 78+17= 90–55= 83–44=83–34= 81–46= 41–27= 97–89= 59+35=34–26= 69+24= 28+28= 29+25= 29+15=35+39= 66–39= 19+19= 51–39= 95–17=62–53= 95–38= 28+69= 29+46= 37+45=41–17= 38+55= 73–15= 64+28= 96–58=28+59= 29+56= 82–13= 58+15= 32–18=81–26= 57+27= 65+26= 95–48= 56+17=74–25= 82–23= 81–36= 91–22= 90–12=36+57= 49+16= 25–17= 34–16= 65+16=62–53= 37+45= 96–58= 32–18= 81–26=56+17= 90–12= 65+16= 85–37= 84–39=71–24= 77–38= 76–28= 77–48= 46+15=学校:___________ 班级：_________ 姓名:___________ 时间:________ 17+69= 18+34= 36–19= 25+68= 16+59=26+55= 48+13= 54+27= 85–27= 70–37=52+29= 39+14= 45+28= 91–83= 45+18=51–42= 46+38= 93–25= 84–59= 18+67=37–29= 93–58= 84–49= 94–45= 25+58=38+27= 19+54= 18+57= 19+44= 92–38=38+17= 26+45= 17+79= 53+39= 92–48=66–39= 81–29= 14+49= 34+19= 31–24=46+46= 48+44= 74–27= 50–19= 82–39=72–53= 60–15= 94–86= 72–43= 74–17=39+45= 94–76= 19+75= 50–29= 68+14=65–19= 13+39= 80–41= 66–29= 39+35=14+59= 47+34= 51–16= 85–78= 66–39=31–24= 82–39= 74–17= 68+14= 65–19=39+35= 66–39= 33–24= 76–18= 42–13=15+39= 92–28= 69+16= 17+27= 64–57=68+29= 83–29= 24+28= 17+37= 33–14=64–47= 40–25= 42–23= 16+49= 84–17=18+24= 76–28= 39+38= 32+59= 83–19=52+19= 91–18= 55–48= 85–26= 67+19=84–39= 18+14= 50–12= 71–58= 50–22=学校:___________ 班级：_________ 姓名:___________ 时间:________ 47+49= 42–33= 93–15= 24+38= 24+48=51–32= 42–13= 64–57= 33–14= 64–47=19+29= 44–15= 53–34= 80–17= 43+28=36+26= 53–24= 87–29= 28+38= 67–59=51–26= 35+16= 87–19= 75–48= 60–35=60–25= 66–49= 61–45= 95–27= 35+49=52–36= 27+18= 75–68= 36+36= 68+24=27+28= 44–25= 29+25= 28+15= 15+79=35+39= 50–39= 95–18= 52–14= 75–58=34+29= 19+39= 30–12= 19+29= 44–15=43+28= 67–59= 60–35= 35+49= 52–36=68+24= 15+79= 75–58= 45+28= 44+18=71–34= 69+27= 51–42= 45+38= 30–15=84–59= 18+67= 36–29= 92–58= 84–49=93–45= 38+27= 19+54= 17+57= 18+44=37+17= 19+32= 85–57= 17+79= 52+39=93–68= 70–47= 92–48= 71–12= 46+25=85–47= 70–14= 26+65= 93–35= 84–69=82–33= 81–13= 57+15= 32–18= 41–27=80–26= 17+28= 56+27= 65+26= 95–48=56+17= 73–25= 74–35= 82–23= 81–36=学校:___________ 班级：_________ 姓名:___________ 时间:________ 90–22= 90–12= 17+18= 49+16= 25–17=81–46= 33–16= 49+26= 59+12= 61–54=96–68= 28+69= 57+37= 40–17= 37+55=29+66= 91–32= 63+28= 95–58= 58+25=29+56= 82–33= 41–27= 95–48= 56+17=81–36= 25–17= 61–54= 37+55= 29+66=58+25= 68+14= 80–41= 19+19= 65–29=14+59= 51–16= 85–78= 66–39= 81–29=13+49= 34+19= 82–49= 47+44= 74–37=74–27= 34+29= 49+19= 14+69= 72–63=81–39= 72–53= 94–86= 35+16= 71–43=73–17= 93–76= 80–51= 39+55= 50–29=27+17= 65–29= 81–29= 74–37= 74–27=46+28= 85–49= 76–18= 86–37= 77–28=82–64= 84–39= 90–53= 70–27= 82–54=45+18= 61–28= 18+37= 91–73= 25+58=62–15= 47+15= 53+29= 84–29= 79+13=38+17= 96–77= 68–29= 17+69= 85–27=52+19= 37+29= 18+57= 77–38= 17+59=18+47= 91–63= 85–17= 37+19= 25+48=61–18= 54–17= 20–12= 71–14= 16+49=学校:___________ 班级：_________ 姓名:___________ 时间:________ 91–77= 56+15= 61–42= 47–19= 36+45=90–41= 24+49= 90–31= 50–32= 33–25=75–19= 41–14= 19+12= 91–29= 16+27=64–57= 23+29= 17+37= 33–15= 63–48=40–26= 42–24= 84–17= 18+25= 76–29=25+36= 39+39= 91–19= 25+26= 84–27=17+15= 50–12= 71–59= 50–22= 42–34=92–16= 24+39= 90–41= 33–25= 75–19=16+27= 63–48= 76–29= 84–27= 17+15=42–34= 53–36= 12+39= 96–39= 28+59=28+39= 14+37= 13+49= 81–17= 57+18=80–29= 64+29= 30–14= 73–28= 95–29=81–27= 80–39= 26+65= 74–16= 49+19=19+73= 64+19= 31–12= 19+63= 45–37=93–54= 18+53= 28+49= 65–17= 72–18=53–46= 28+59= 57+18= 95–29= 81–27=49+19= 45–37= 72–18= 39+14= 63–46=14+38= 81–18= 85–67= 13+18= 71–22=30–15= 92–68= 52–39= 31–13= 85–57=19+64= 45–38= 93–55= 23–14= 18+54=19+42= 92–58= 73–19= 13+28= 88–29=学校:___________ 班级：_________ 姓名:___________ 时间:________ 82–74= 46+28= 77–28= 82–54= 45+18=25+58= 79+13= 85–27= 17+59= 18+47=25+48= 16+49= 61–53= 28+26= 29+23=29+13= 15+77= 55–29= 35+37= 29+33=78+18= 27+38= 52–45= 27+48= 95–16=75–56= 83–67= 27+58= 94–28= 94–18=95–38= 80–16= 36+25= 47–18= 28+36=63+18= 63+28= 36+57= 60–33= 28+46=66+29= 70–58= 63–56= 45+49= 47+46=86–78= 72–65= 71–55= 66–19= 74+18=71–45= 38+48= 48+24= 91–15= 93–79=19+65= 80–54= 39+58= 18+78= 72–43=77–69= 39+35= 48+44= 67+16= 86–68=39+25= 38+38= 94–66= 46+36= 50–19=63–34= 62–46= 72–33= 48+34= 19+75=66+29= 47+46= 74+18= 93–79= 19+65=72–43= 86–68= 50–19= 19+75= 66+29=68–19= 58+33= 96–57= 16+29= 58+23=29+54= 56–48= 55–38= 58+13= 16+39=32–17= 63–49= 40–28= 41–25= 83–19=17+27= 56+25= 32+49= 25+38= 24+28=学校:___________ 班级：_________ 姓名:___________ 时间:________ 84–29= 32+39= 17+17= 85–17= 70–61=24+18= 42–13= 42–23= 49+24= 92–18=90–53= 90–43= 96–67= 76–18= 28+67=17+78= 53+38= 93–67= 92–47= 47+24=85–46= 70–13= 27+65= 13+39= 93–35=80–19= 85–68= 85–36= 71–23= 94–55=17+68= 25+67= 26+55= 39+13= 45+27=45+17= 71–33= 69+26= 46+37= 31–14=84–58= 18+66= 37–28= 93–57= 84–48=94–45= 38+26= 19+53= 18+56= 19+43=13+29= 17+78= 47+24= 93–35= 80–19=94–55= 45+27= 31–14= 84–48= 94–45=19+43= 28+14= 52–23= 74–47= 90–67=97–68= 14+78= 97–58= 58+37= 52–13=14+68= 57+39= 82–68= 49+28= 77+19=90–57= 82–45= 81–58= 74–57= 88–59=82–35= 60–11= 58+27= 81–48= 73–37=83–55= 90–67= 52–13= 77+19= 90–57=88–59= 73–37= 44–17= 43–29= 93–44=60–52= 29+32= 16+17= 64–15= 70–29=23+19= 64–25= 37+54= 63–27= 39+29=学校:___________ 班级：_________ 姓名:___________ 时间:________ 55–16= 29+42= 91–75= 55–39= 38+19=63–37= 33–15= 62–17= 79+15= 23+29=40–16= 83–64= 70–49= 54–29= 70–39=60–52= 70–29= 39+29= 38+19= 63–37=23+29= 70–39= 28+48= 40–19= 73–16=29+68= 87–39= 96–38= 87–29= 29+58=13+48= 81–15= 57+16= 41–29= 80–28=56+29= 13+58= 65+28= 56+19= 29+35=96–48= 73–26= 96–28= 82–25= 80–38=90–24= 90–14= 36+59= 30–23= 49+18=88–49= 33–18= 64+18= 49+28= 28+48=73–16= 29+58= 80–28= 29+35= 96–48=80–38= 49+18= 46+17= 62–27= 18+36=91–72= 26+57= 63–15= 47+15= 53+28=74–45= 90–65= 91–42= 54–18= 97–89=91–52= 71–16= 58+35= 34–26= 82–66=78+17= 90–55= 83–44= 70–28= 81–56=74–55= 59+22= 96–79= 83–54= 74–45=97–89= 82–66= 81–56= 62–17= 59+22=74–45= 77–68= 49+43= 68+15= 23–14=86–67= 39+24= 80–43= 38+37= 94–66=学校:___________ 班级：_________ 姓名:___________ 时间:________ 47+36= 51–18= 48+33= 67–28= 95–76=70–57= 63–56= 46+48= 47+45= 86–77=72–64= 71–54= 58–19= 58–29= 66–18=75+17= 71–44= 73–19= 39+47= 48+23=92–14= 93–78= 19+64= 80–53= 39+57=18+77= 42–19= 23–14= 94–66= 47+36=95–76= 86–77= 66–18= 48+23= 92–14=39+57= 50–23= 42–35= 92–17= 90–52=90–42= 47–38= 90–32= 57+35= 50–33=97–89= 61–42= 90–11= 74–67= 83–76=55–29= 36+56= 71–39= 35+46= 55–19=61–52= 70–51= 70–29= 91–65= 60–32=63–27= 92–75= 37+44= 29+12= 39+19=70–19= 90–78= 29+22= 92–85= 83–66=37+34= 63–17= 78+17= 97–89= 61–42=83–76= 55–19= 60–32= 39+19= 70–19=83–66= 40–21= 19+52= 29+48= 60–48=67–59= 73–16= 13+28= 13+38= 88–39=97–38= 88–29= 61–45= 29+38= 36+49=14+48= 82–15= 96–18= 80–18= 81–28=72+19= 57+19= 31–13= 96–28= 53–46=学校:___________ 班级：_________ 姓名:___________ 时间:________ 36+59= 31–23= 61–35= 65+18= 53–36=87–19= 60–48= 88–39= 36+49= 14+48=81–28= 53–46= 53–36= 18+26= 59+22=90–65= 82–43= 43–35= 54+18= 91–42=17+16= 16+38= 56–37= 90–19= 92–27=64–36= 17+26= 50–33= 65–56= 71–47=84–28= 24+27= 18+36= 64–46= 41–24=17+48= 42–34= 50–23= 85–16= 19+23=75+19= 83–18= 92–17= 56–47= 68+18=39+59= 24+59= 24+49= 18+13= 72–57=23+39= 47+48= 93–14= 25+37= 63–48=91–39= 91–29= 76–17= 17+16= 16+38=92–27= 71–47= 41–24= 19+23= 75+19=68+18= 72–57= 63–48= 15+76= 81–59=81–36= 20–13= 59+35= 96–59= 15+66=58+37= 35–26= 74–25= 49+49= 83–24=91–22= 91–32= 91–55= 83–44= 97–69=81–69= 49+39= 26–17= 90–35= 82–56=34–16= 83–34= 60–12= 60–22= 59+25=90–67= 97–79= 82–46= 74–35= 29+12=63–38= 39+39= 54+29= 47+38= 38+29=学校:___________ 班级：_________ 姓名:___________ 时间:________ 81–26= 57+27= 74–25= 53–45= 91–12=62–53= 41–17= 29+36= 81–16= 81–26=34+19= 75–26= 94–87= 51–17= 83–37=82–17= 75–16= 49+19= 74–38= 47+35=80–42= 66–17= 66–39= 80–62= 14+37=40–33= 80–52= 74–28= 93–77= 82–27=73–18= 15+47= 94–65= 47+45= 49+42=83–37= 47+35= 14+37= 82–27= 73–18=49+42= 55–18= 78–49= 71–28= 91–64=61–32= 64–26= 78–29= 62–29= 62–19=91–57= 91–67= 60–34= 82–58= 61–22=44+47= 15+78= 91–77= 84–55= 74–59=61–12= 66–48= 29+14= 59+37= 83–45=90–79= 29+24= 16+75= 82–68= 36+35=63–19= 42+49= 78+19= 35+38= 28+37=28+27= 28+47= 75–67= 67–58= 84–65=36+25= 61–44= 75–47= 96–27= 95–17=35+48= 75–57= 16+65= 29+34= 60–24=91–57= 61–22= 74–59= 83–45= 90–79=36+35= 28+37= 84–65= 95–17= 35+48=60–24= 41–24= 17+47= 42–34= 50–22=学校:___________ 班级：_________ 姓名:___________ 时间:________ 19+22= 75+19= 64–57= 84–17= 92–16=68+17= 24+59= 24+49= 19+12= 72–56=23+39= 71–59= 48+47= 25+36= 63–47=92–39= 91–29= 77+16= 39+49= 17+15=91–19= 93–26= 64–35= 87–79= 86–69=17+27= 50–35= 29+55= 71–49= 90–11=24+29= 24+19= 34–15= 64–47= 41–26=42–24= 92–85= 58+24= 57+14= 92–19=25+26= 56–49= 37+54= 18+15= 72–59=25+16= 90–44= 70–61= 24+39= 29+65=41–16= 34–25= 42–14= 17+17= 55–39=90–21= 64–37= 17+27= 90–11= 24+29=41–26= 92–19= 72–59= 29+65= 41–16=55–39= 14+17= 92–47= 31–14= 96–29=93–67= 31–24= 36–28= 52–38= 47+34=19+63= 45–37= 26+55= 19+53= 29+49=93–57= 93–34= 60–49= 14+27= 28+29=13+29= 12+19= 19+43= 13+39= 45–27=28+39= 96–19= 80–19= 96–29= 93–67=47+34= 29+49= 28+29= 45–27= 28+39=86–49= 63–47= 72–23= 47+17= 18+69=学校:___________ 班级：_________ 姓名:___________ 时间:________ 74–59= 83–35= 73–49= 60–24= 73–39=58+26= 82–48= 97–48= 74–37= 14+48=42+39= 90–47= 27+16= 66–38= 81–38=59+36= 40–32= 52–13= 57+29= 14+68=57+39= 65+28= 34+28= 74–27= 82–25=58+17= 66–48= 36+15= 26–19= 90–37=14+58= 34+18= 29+58= 94–85= 74–59=73–39= 14+48= 81–38= 14+68= 57+39=82–25= 90–37= 74–59= 80–66= 52–28=36–18= 77+14= 39+47= 38+59= 81–63=93–24= 18+23= 73–64= 50–31= 28+19=69+26= 18+33= 43–19= 50–21= 67+18=75+17= 64–56= 53–15= 92–14= 68+16=72–54= 67+28= 45–17= 52–18= 48+46=43–29= 81–53= 92–47= 52–28= 36–18=81–63= 28+19= 67+18= 68+16= 72–54=92–13= 94–77= 81–52= 19+76= 71–33=46+37= 70–46= 80–65= 80–42= 39+36=47+35= 39+26= 85–78= 63–45= 49+32=94–67= 71–56= 64–55= 46+47= 80–32=48+45= 47+25= 72–53= 85–68= 94–87=学校:___________ 班级：_________ 姓名:___________ 时间:________ 75+16= 72–43= 74–18= 39+46= 92–13=71–33= 39+36= 49+32= 80–32= 48+45=94–87= 92–13= 95–27= 95–17= 96–37=35+58= 35+48= 75–57= 61–54= 29+34=52–23= 64+17= 91–67= 60–34= 63–29=55–18= 61–32= 61–22= 91–77= 83–55=47–19= 36+45= 28+14= 29+24= 16+75=82–68= 36+35= 62–19= 42+49= 78+19=35+38= 79+17= 28+37= 28+47= 75–67=66–58= 84–65= 84–75= 36+25= 60–44=96–37= 29+34= 63–29= 83–55= 47–19=61–34= 60–24= 43+49= 67–48= 60–14=52–35= 28+17= 58–49= 58–39= 82–48=69+23= 28+27= 44–37= 29+14= 15+78=66–38= 19+18= 79+19= 27+39= 27+29=51–38= 27+49= 96–17= 75–37= 69+13=76–57= 35+28= 60–47= 74–49= 95–29=94–19= 80–73= 44+27= 37+25= 74–59=15+68= 67–58= 52–25= 42+39= 36+15=87–18= 75–47= 61–34= 60–14= 52–35=82–48= 15+78= 27+29= 69+13= 76–57=学校:___________ 班级：_________ 姓名:___________ 时间:________ 56–37= 85–49= 39+17= 64–36= 92–83=46+18= 18+69= 63–16= 47+28= 54+39=41–14= 86–59= 83–74= 23+29= 55–27=19+79= 71–37= 38+19= 55–17= 70–49=72–14= 70–39= 18+59= 71–27= 24+17=64–26= 62–28= 92–73= 63–38= 39+39=38+29= 92–83= 54+39= 55–27= 19+79=70–49= 24+17= 69+24= 28+28= 29+15=43–18= 36+39= 67–39= 19+19= 51–39=53–14= 69+14= 35+29= 60–48= 52–16=44–28= 52–26= 35+19= 95–87= 60–38=61–35= 61–25= 67–49= 51–29= 60–15=53–36= 28+18= 29+15= 51–39= 53–14=52–16= 60–38= 60–15= 25+48= 46+28=18+24= 45+18= 90–63= 70–27= 93–25=57+27= 66+26= 96–48= 57+17= 74–25=82–23= 81–36= 37+35= 64+18= 53–45=91–12= 28+49= 37+57= 65+16= 62–53=95–38= 29+68= 29+46= 38+45= 41–17=74–15= 64+28= 28+59= 62–43= 29+36=36+47= 82–13= 58+15= 33–18= 81–16=学校:___________ 班级：_________ 姓名:___________ 时间:________ 95–29= 74–59= 36+15= 18+15= 50–12=71–59= 25+16= 70–61= 50–22= 90–54=93–16= 24+39= 90–31= 58+34= 34–25=76–19= 42–14= 16+17= 55–39= 90–21=92–29= 63–38= 17+27= 64–57= 71–49=24+29= 17+37= 33–15= 64–47= 41–26=81–35= 90–11= 37+56= 17+17= 34–15=62–53= 95–38= 28+68= 40–19= 90–34=84–76= 29+45= 38+44= 41–16= 38+54=64+28= 96–58= 28+58= 56–39= 82–13=58+14= 33–18= 40–29= 42–26= 81–25=57+26= 56–29= 96–48= 57+16= 81–35=34–15= 90–34= 38+54= 82–13= 58+14=81–25= 81–35= 30–17= 76–27= 47+14=17+68= 19+33= 37–18= 25+67= 17+58=27+55= 85–26= 53+28= 46+27= 45+17=69+26= 46+37= 31–14= 93–25= 85–58=18+66= 37–28= 93–57= 84–48= 94–45=25+57= 23–16= 39+26= 18+56= 19+43=92–37= 38+16= 26+45= 13+29= 17+78=53+38= 93–47= 18+46= 47+24= 71–13=学校:___________ 班级：_________ 姓名:___________ 时间:________ 27+65= 94–35= 85–36= 13+19= 84–38=53–25= 52–28= 36–18= 77+14= 12+19=81–63= 92–24= 49+43= 60–27= 93–34=72–64= 50–31= 60–17= 52–38= 27+19=68+26= 28+29= 18+33= 45–27= 43–19=81–73= 50–41= 53–16= 92–14= 18+43=68+16= 67+28= 44–17= 51–18= 43–29=36–28= 53–25= 12+19= 93–34= 72–64=27+19= 43–19= 18+43= 43–29= 36–28=42–35= 53+18= 18+58= 19+46= 91–62=38+18= 26+47= 62–17= 55–16= 20–11=72–13= 17+48= 59+32= 70–16= 85–38=17+38= 91–52= 70–26= 90–75= 82–53=46+17= 62–27= 25+37= 18+36= 63–15=54+28= 84–28= 18+26= 90–65= 42–35=91–62= 20–11= 85–38= 82–53= 46+17=63–15= 73–29= 66–38= 81–28= 14+48=93–79= 14+49= 94–66= 71–55= 47+46=80–31= 48+44= 47+24= 75–27= 50–19=81–19= 85–68= 95–86= 76+15= 72–43=74–17= 94–76= 19+75= 72–33= 46+36=学校:___________ 班级：_________ 姓名:___________ 时间:________ 71–45= 66–19= 80–64= 14+39= 80–41=66–29= 39+35= 48+34= 39+25= 86–78=93–79= 47+46= 50–19= 72–43= 74–17=46+36= 80–41= 86–78= 91–66= 60–33=63–28= 56–17= 91–76= 83–55= 47–18=37+44= 28+13= 39+19= 70–19= 90–78=29+23= 16+75= 82–67= 63–18= 78+18=35+37= 28+46= 75–66= 84–65= 84–75=36+25= 61–43= 90–12= 95–26= 95–16=55–29= 36+57= 70–39= 35+47= 75–56=54–19= 61–53= 29+33= 70–29= 91–66=60–33= 47–18= 90–78= 78+18= 35+37=65–57= 71–48= 15+29= 84–29= 24+28=17+37= 33–14= 64–47= 41–25= 42–23=16+49= 85–16= 18+24= 83–19= 92–18=56–48= 68+19= 18+14= 50–12= 72–58=32+49= 51–22= 47+49= 93–15= 24+38=63–49= 58+33= 76–18= 42–13= 17+17=16+39= 55–38= 92–28= 64–37= 17+27=50–34= 65–57= 24+28= 42–23= 16+49=92–18= 72–58= 24+38= 17+17= 16+39=学校:___________ 班级：_________ 姓名:___________ 时间:________ 62–29= 91–74= 62–39= 47+39= 55–38=78–39= 46+19= 61–42= 61–52= 78–49=57+28= 65+27= 96–49= 56+18= 31–12=74–25= 96–27= 82–24= 81–37= 63+19=53–46= 90–13= 27+49= 36+58= 31–22=49+17= 65+17= 62–54= 95–39= 28+69=29+47= 41–18= 73–15= 64+29= 48+19=28+59= 61–44= 29+57= 29+37= 36+48=82–14= 58+15= 32–19= 80–17= 48+29=81–27= 57+28= 31–12= 63+19= 53–46=31–22= 28+69= 48+19= 36+48= 82–14=48+29= 33–19= 97–69= 82–27= 26–18=90–36= 49+19= 15+57= 35+17= 90–58=83–34= 74–48= 60–13= 83–14= 73–38=59+26= 82–47= 57+18= 73–28= 14+69=75–36= 14+47= 91–46= 80–39= 96–49=66–37= 66+17= 81–59= 82–37= 90–26=65+29= 37+58= 97–59= 49+29= 40–21=92–49= 70–15= 85–37= 51–32= 27+34=18+57= 85–27= 54+27= 42–34= 25+69=26+46= 73–66= 19+22= 46+16= 71–25=学校:___________ 班级：_________ 姓名:___________ 时间:________ 85–47= 26+56= 92–39= 93–59= 93–36=27+44= 33+58= 45–19= 94–46= 19+45=69+17= 45–29= 25+59= 17+47= 51–42=69+27= 80–11= 93–26= 18+35= 92–49=27+34= 25+69= 71–25= 93–36= 27+44=19+45= 51–42= 92–49= 16+75= 92–74=78–39= 71–18= 91–77= 47–19= 83–65=64–16= 21–13= 79+16= 78–19= 75–67=84–75= 82–68= 36+45= 55–18= 61–22=91–54= 71–28= 92–64= 61–32= 90–67=83–55= 78–29= 63–29= 62–19= 16+75=92–74= 83–65= 75–67= 61–22= 91–54=90–67= 80–55= 95–77= 69+15= 81–42=86–68= 94–57= 27+55= 49+22= 28+65=72–33= 39+16= 47+37= 80–22= 71–46=80–45= 71–36= 19+56= 72–23= 63–25=64–35= 49+12= 55+26= 48+35= 39+26=64–45= 30–17= 46+27= 47+15= 18+69=19+66= 18+79= 26+67= 54+38= 94–67=23–16= 47+47= 81–32= 48+25= 55+36=85–58= 86–68= 28+65= 71–46= 80–45=学校:___________ 班级：_________ 姓名:___________ 时间:________ 63–25= 39+26= 18+69= 94–67= 23–16=55+36= 74–59= 61–12= 67–48= 29+14=60–47= 84–45= 90–79= 29+24= 17+75=83–68= 37+35= 53–45= 43+49= 79+19=35+38= 28+37= 28+27= 27+17= 67–58=35+28= 36+25= 61–44= 75–47= 96–17=38+23= 15+68= 36+48= 75–57= 16+65=42+39= 60–24= 36+15= 44+37= 91–57=36+28= 67–28= 75–49= 52–15= 81–73=49+43= 44–27= 75–59= 81–63= 60–27=53–25= 35+18= 95–86= 43+39= 60–37=61–24= 74–39= 51–28= 61–14= 28+17=90–82= 58–29= 72–64= 42+19= 44–17=43+29= 67–38= 51–18= 27+29= 52–38=27+19= 69+13= 36+28= 81–73= 49+43=60–27= 60–37= 28+17= 44–17= 43+29=52–38= 70–51= 71–39= 41–16= 42–14=17+17= 56–39= 64–37= 55–29= 40–29=90–34= 29+55= 37+44= 90–11= 24+29=24+19= 34–15= 65–47= 41–26= 64–27=92–85= 50–25= 58+24= 58+14= 56–49=学校:___________ 班级：_________ 姓名:___________ 时间:________ 29+45= 36+56= 38+54= 25+16= 62–53=42–14= 40–29= 24+29= 64–27= 92–85=56–49= 62–53= 15+56= 35+16= 90–57=93–25= 19+34= 93–48= 30–18= 85–37=51–32= 18+57= 85–27= 37–29= 54+27=25+68= 26+45= 73–65= 47+15= 71–24=53–39= 86–47= 54+17= 26+55= 92–38=93–58= 94–35= 52–29= 68+29= 45–18=94–45= 19+44= 69+17= 45–28= 25+58=18+47= 37–19= 51–42= 69+27= 52–19=93–25= 85–37= 54+27= 71–24= 53–39=92–38= 45–18= 25+58= 52–19= 93–25=18+49= 85–29= 70–19= 82–67= 39+19=55–17= 86–39= 54–19= 70–39= 92–53=18+59= 71–27= 92–63= 91–66= 83–54=63–28= 63–18= 16+75= 90–78= 54–29=86–49= 71–17= 91–76= 47+18= 19+69=64–16= 21–12= 79+16= 23+19= 70–29=39+19= 92–53= 83–54= 54–29= 86–49=50–34= 42–13= 92–28= 48+37= 47+49=18+14= 91–18= 32+59= 87–68= 18+24=学校:___________ 班级：_________ 姓名:___________ 时间:________ 87–58= 50–11= 32+49= 72–45= 42–23=67+19= 76+18= 98–19= 64–57= 84–16=80–57= 93–15= 95–79= 25+48= 73–55=24+38= 94–69= 71–58= 48+46= 24+28=26+35= 64–47= 80–67= 50–34= 42–13=47+49= 18+24= 42–23= 84–16= 80–57=73–55= 24+28= 54–35= 95–18= 96–38=45–36= 31–23= 80–28= 37+37= 61–46=28+39= 90–81= 29+26= 40–32= 49+18=29+58= 62–43= 37+47= 90–15= 96–28=81–16= 76–69= 44+49= 64+18= 54–45=29+48= 37+57= 62–33= 96–38= 45–36=61–46= 49+18= 96–28= 54–45= 29+48=71–45= 80–44= 71–35= 19+55= 72–23=90–56= 97–79= 17+29= 25–18= 96–69=83–44= 43–36= 57+38= 91–43= 43–26=85–19= 90–46= 42–16= 82–34= 17+19=41–28= 50–27= 58+26= 59+36= 67+24=59+13= 18+39= 34–17= 91–33= 34–27=90–56= 96–69= 43–26= 17+19= 41–28=67+24= 34–27= 62–23= 74–38= 52–27=学校:___________ 班级：_________ 姓名:___________ 时间:________ 61–13= 29+16= 72–63= 43+18= 44–16=43+28= 51–17= 60–16= 28+28= 52–37=27+18= 36+27= 75–48= 53–15= 81–72=49+42= 45–26= 75–58= 81–62= 60–26=53–25= 36+17= 44+38= 37+15= 16+57=60–36= 90–71= 52–27= 90–81= 72–63=44–16= 52–37= 81–72= 60–26= 53–25=16+57= 47–29= 63–49= 71–38= 41–15=48–39= 17+17= 56–38= 16+19= 64–37=96–48= 57+17= 64+18= 54–45= 91–12=28+49= 37+57= 62–33= 66+16= 53–35=62–53= 96–38= 61–46= 74–15= 90–25=64+28= 49+18= 29+58= 62–43= 29+36=37+47= 95–28= 82–13= 81–16= 81–26=96–48= 91–12= 53–35= 90–25= 64+28=29+36= 81–26= 19+34= 37–19= 20–12=17+59= 90–53= 84–29= 85–27= 53+29=42–35= 25+48= 19+24= 46+18= 91–63=70–27= 94–25= 85–49= 53+19= 26+58=54+17= 85–17= 93–38= 65–57= 27+45=63–15= 33+59= 93–48= 18+47= 68+19=学校:___________ 班级：_________ 姓名:___________ 时间:________ 17+27= 15+77= 81–59= 81–37= 59+36=80–49= 14+67= 57+38= 34–27= 74–26=49+49= 82–24= 90–56= 83–44= 96–69=81–69= 49+39= 26–18= 90–36= 82–57=14+57= 34–17= 73–58= 83–34= 60–23=58+26= 97–79= 82–47= 74–36= 28+13=75–46= 90–46= 59+36= 74–26= 49+49=92–49= 84–37= 71–22= 30–16= 47+14=17+67= 19+32= 26+66= 92–69= 17+58=27+54= 24+69= 46+26= 45+16= 46+36=31–14= 85–57= 19+65= 93–56= 85–47=25+56= 23–15= 39+25= 18+55= 19+42=92–59= 93–36= 38+15= 13+29= 18+77=93–46= 18+45= 44–29= 47+24= 71–12=27+64= 80–21= 13+19= 92–49= 84–37=47+14= 17+58= 46+36= 85–47= 25+56=19+42= 18+77= 71–12= 55–38= 78–39=39+18= 64–36= 63–49= 92–84= 46+19=63–16= 46+29= 40–15= 97–88= 61–42=83–75= 55–28= 71–38= 54–18= 61–52=78–49= 70–28= 23+18= 63–26= 39+28=两位数加减法练习题(三十)学校:___________ 班级：_________ 姓名:___________ 时间:________ 17+49= 71–14= 34+47= 59+33= 51–44=69+29= 93–15= 86–37= 92–28= 18+37=70–17= 84–39= 91–73= 77–38= 50–34=77–28= 26+35= 77–18= 20–12= 17+59=71–58= 52–19= 48+47= 64–47= 92–38=80–67= 91–28= 78–69= 77+15= 17+14=91–18= 32+59= 93–25= 87–78= 87–68=18+24= 73–65= 98–29= 72–45= 84–26=18+34= 42–23= 42–33= 50–21= 67+19=76+18= 64–57= 92–15= 94–79= 69+16=25+58= 24+48= 72–55= 67+29= 71–58=92–38= 17+14= 87–68= 84–26= 18+34=67+19= 69+16= 71–58= 50–37= 90–33=83–54= 34–27= 90–56= 85–29= 96–79=17+29= 59+23= 90–66= 96–69= 82–44=43–36= 91–43= 42–26= 85–19= 82–34=21–12= 97–89= 18+49= 58+36= 17+39=91–53= 90–33= 96–79= 82–44= 43–36=82–34= 17+39= 85–58= 86–68= 94–56=75+17= 95–76= 28+64= 72–33= 47+36=29+39= 96–19= 81–18= 31–13= 96–29=两位数加减法练习题(三十一)学校:___________ 班级：_________ 姓名:___________ 时间:________ 73–64= 96–37= 29+67= 48–39= 40–18=84–76= 38+43= 42–15= 39+53= 16+19=90–23= 65+27= 29+57= 29+34= 37+46=90–13= 57–38= 59+13= 33–17= 81–14=41–28= 63+29= 82–24= 58+25= 56–28=96–47= 57+15= 82–34= 38+33= 64+17=28+47= 36+58= 37+56= 32–19= 56–18=25–18= 61–54= 47–19= 70–53= 70–63=48–29= 40–18= 16+19= 37+46= 90–13=81–14= 56–28= 64+17= 56–18= 25–18=。

数学教案：小学二年级两位数加减法一、引言数学是一门普遍应用于我们日常生活中的学科。

在小学二年级，学生开始接触两位数的加减法，这是他们数学学习中的重要一步。

通过掌握两位数的加减法，学生不仅能提升数学能力，还能培养逻辑思维和解决问题的能力。

本教案将帮助学生通过各种互动活动和练习，深入理解两位数的加减法。

二、教学目标1. 理解和掌握两位数的加法和减法原理和运算方法。

2. 能够独立解决两位数加减法的问题。

3. 培养学生的数学思维和解决问题的能力。

4. 加深交流合作能力，提高学生自信心。

三、教学重点1. 掌握两位数的加法和减法概念。

2. 理解进位和退位的概念和方法。

四、教学准备1. 两位数加法和减法卡片。

2. 直尺和尺子。

3. 工作纸和铅笔。

五、教学过程A. 导入（5分钟）通过展示两位数的加法和减法算式，引起学生的兴趣，并让学生主动提出一些问题，例如“如何计算两位数的加和减法？”，以激发学生的思考。

B. 概念讲解（10分钟）1. 导入两位数的概念：使用卡片和直尺，展示两位数的形式，并解释十位数和个位数的含义。

2. 加法原理介绍：通过示例，讲解了两位数加法的规则和方法。

3. 减法原理介绍：通过示例，讲解了两位数减法的规则和方法。

C. 讲解进位和退位（10分钟）1. 进位概念解释：通过示例，引导学生理解进位的含义和作用。

2. 退位概念解释：通过示例，引导学生理解退位的含义和作用。

3. 让学生互相操练进位和退位的方法，加深他们对这些概念的理解。

D. 练习活动（25分钟）1. 组织学生进行两位数加法和减法的口算练习，检查他们的计算能力。

2. 将学生分成小组，让他们互相提出两位数加减法问题，然后通过交流和讨论解决问题。

3. 使用工作纸和铅笔，让学生独立完成两位数的加减法练习，并互相检查答案。

E. 总结与归纳（5分钟）让学生总结两位数加减法的规则和方法，并解决他们在学习过程中遇到的问题。

六、拓展活动1. 使用数学游戏帮助学生巩固对两位数加减法的理解和运用。