《乘法交换律》练习题
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乘法交换律与结合律及简便运算练习题一.填空:1.15×16=1616=16×□×□乘法乘法---------------------------------------侓侓2.252.25××7×4=4=□×□×□×□×□×□×7 7 7 乘法乘法乘法------------------侓侓3.3.((6060××2525)×□)×□)×□=60=60=60×(□××(□××(□×88)乘法乘法---------侓侓4.1254.125×(×(×(88×□)×□)==(125125×□)××□)××□)×14 14 14 乘法—侓乘法—侓5.35.3××4×8×5=5=((3×4)×(□×□)乘法—侓二填合适的数:1.361.36××15=1515=15×(×()2.252.25××1717××4=4=(□×□)×(□×□)×(□×□)×17 173.3.((1111××2525)×□)×□)×□=11=11=11××(□×□×4) 4)4.304.30××6×7=307=30××(□×□□×□) )三.简便计算:1.25×36×42.17×125×83.253.25××5×4×64.46 4.4××4949××255.155.15××226.5022 6.50×(×(×(326326326××2020))7.125 7.125××1717××16四.应用题:1.1.学校有一幢学校有一幢5层教学楼,每层有12间教室,每间教室有6个窗户。
运算定律练习题(1)乘法交换律:a×b=b×a 乘法结合律:(a×b)×c=a×(b×c)38×25×4 42×125×8 25×17×4 (25×125)×(8×4)49×4×538×125×8×3 (125×25)×4 5 ×289×2 (125×12)×8 125×(12×4)(2) 乘法交换律和结合律的变化练习125×64 125×88 44×25 125×24 25×28(3)加法交换律:a+b=b+a 加法结合律:(a+b)+c=a+(b+c)357+288+143 158+395+105 167+289+33 129+235+171+165 378+527+73 169+78+22 58+39+42+61 138+293+62+107(4)乘法分配律:(a+b)×c=a×c+b×c 正用练习(80+4)×25 (20+4)×25 (125+17)×8 25×(40+4)15×(20+3)(5)乘法分配律正用的变化练习:36×3 25×41 39×101 125×88 201×24 (6)乘法分配律反用的练习:34×72+34×28 35×37+65×37 85×82+85×1825×97+25×3 76×25+25×24(7)乘法分配律反用的变化练习:38×29+38 75×299+75 64×199+64 35×68+68+68×64☆思考题:(8)其他的一些简便运算。
《乘法交换律、结合律》专项练习1、根据乘法运算定律填空。
(1)75×24=24×75(2)25×19×4=25×4×19(3)125×(24×8)=24×(125×8)2、根据下面的算式写出运算定律(1)9×(18×4)=(9×18)×4 (乘法结合律)(2)49×73=73×49 (乘法交换律)(3)a+b=b+a (加法交换律)(4)8×(3×X)=X×(8×3) (乘法交换律、乘法结合律)(5)42+38+62=42+(38+62)(加法结合律)3、在最简便的计算方法后面画“√”。
(1)25×125×8×4A.(25×4)×(125×8) ( √)B.(25×8)×(125×4) ( )(2)125×4×8A.(8×4)×125 ( )B.4×(125×8) ( √)《乘法交换律、结合律》专项练习4、判断题(1)321+267=267+321 ( √)(2)25×69×4=25×4×69,是运用了乘法交换律。
( √) (3)(125×a)×8与125×8×a不一定相等。
( ×)(4)8×5×4=5×8+4。
(×)5、用简便方法计算。
19×25×4=19×(25×4) =190050×(23×2) =50×2×23 =23007×125×8=7×(125×8) =7000 40×(33×25) =40×25×33 =3300025×9×4=25×4×9=100×9=9005×87×20=5×20×87 =100×87=8700《乘法交换律、结合律》专项练习6、学校开展“阳光体育活动”,买来25盒羽毛球,每盒有12个,每个羽毛球4元。
《乘法交换律、结合律》同步练习一、我会口算50×2= 18×5=35×2= 8×25=125×8= 14×5=5×24= 12×5=5×16= 15×6=二、我会选(1)1534-534-278等于()A.534B.634C.722(2)58+36+64=58+(36+64)应用了()。
A.加法交换律B.加法结合律C.加法交换律和加法结合律(3)50×25×4×2=(50×2)×(25×4)这里运用了()。
A.乘法交换律B.乘法结合律C.乘法交换律和乘法结合律三、我是小法官(1)26×57+43×26=26×(57+43)()(2)125×(8×4)=(125×8)×4 ()(3)64×12=64×10×2 ()(4)几个数相乘,改变它们原来的运算顺序,积不变。
()四、怎样算简便就怎样算。
468-73-68 47+348+53+52(13×125)×(3×8) 28×6×2525×32×125 125×64五、解决问题1、一个游泳池长50m,小强每次都游7个来回。
他每次游多少米?2、四年级有3个班,每班有42人,四年级全体学生一共收集报纸504千克。
平均每个学生收集了多少千克?3、爸爸、妈妈带着明明去春游,先做公共汽车行驶8分钟,平均每分钟行驶120米,然后又步行380米走到天鹅湖。
则从家到天鹅湖的路程是多少米?4、学校参加合唱队共有队员58人,其中有6人参加小合唱,其余的人站成4排。
平均每排站多少人?参考答案一、我会口算50×2=100 18×5=9035×2=70 8×25=200125×8=100 14×5=705×24=120 12×5=605×16=80 15×6=90二、我会选(1)1534-534-278等于(B)A.534B.634C.722(2)58+36+64=58+(36+64)应用了(B )。
运算定律练习题乘法交换律一、选择题:1. 下列选项中,哪一项正确地应用了乘法交换律?A. 3×4=4×3B. 5×6=6×5C. 7×8=8×9D. 2×3=4×62. 根据乘法交换律,以下哪个等式是正确的?A. 8×9=9×8B. 3×12=12×3C. 5×0=0×5D. 所有选项都正确3. 如果a和b是任意两个数,那么根据乘法交换律,以下哪个等式是正确的?A. a×b=b×aB. a×b=a+bC. a×b=b-aD. a×b=a÷b二、填空题:1. 根据乘法交换律,我们可以将______×15写成15×______。
2. 计算过程中,如果需要交换两个因数的位置,根据乘法交换律,那么______×45的结果不变。
3. 乘法交换律告诉我们,两个数相乘时,交换它们的位置,积______。
三、判断题:1. 乘法交换律只适用于整数。
(对/错)2. 根据乘法交换律,我们可以将任何两个数相乘的顺序互换。
(对/错)3. 乘法交换律不适用于分数和小数。
(对/错)四、计算题:1. 计算下列各题,并验证乘法交换律是否成立。
- 23×42- 0.5×82. 计算下列各题,并交换因数的位置后再次计算,比较结果。
- 36×7- 18×5五、解答题:1. 请解释乘法交换律,并给出一个例子。
2. 假设你有两个数4和7,使用乘法交换律,计算4×7和7×4的结果,并说明它们是否相等。
六、应用题:1. 一个长方形的长是15厘米,宽是12厘米。
根据乘法交换律,计算这个长方形的面积。
2. 一个班级有24个学生,每个学生需要分发5本练习本。
根据乘法交换律,计算总共需要多少本练习本。
四年级乘法交换律练习题精品文档四年级乘法交换律练习题一、计算下列各题××25135×6+65××4018×82+18×47+18×71×125×9×45+31×45123×9+12312×7+125二、计算下列各题能简算要简算5×10247×1018×387×1995×201,48×101,3899×201,9 102×83124×25,25×24×25135×6+65××4035×37+65×38×16×256,16×568×29+38×99+795×425×1995×199+2125×885×3 7+65×8×18×82+18×47+18×71×24+26×20×2+25× ×40三、直接写得数5×4= ×25= 125×8=×125= 0×5=5×12= 12×5= ×50= 0×4= ×50= ×=15×= ×5=6×= ×20= 13×= 四、用简便方法计算9×120+1208×25×8×17×12×8×25×1255×2×5=35××4=60×125×5×8=××4×125×2125×8×2×125×25×6×41251 / 6精品文档×8× ×6,×125×1 16×2125×34×125,,×,,,,×,×,23×3=0×5= 13×100= 5×4= 125×8=195×25×42×125×8× 125×489×20×17×2×5×2×110×2+90× × 12×105四年级下册数学乘法结合律专项练习题姓名:1、我会填?400×______×=00×?×c = a× ?35×______=6×_______ ?45×5×=5× ?125×32×2= ×?a×b =_____×_____2、符合乘法交换律的画?符合结合律的画??35×28=28×3 ?32×25=8× ?25×15×4×2=× ? a×b×c=a×c×b3、算一算,想一想,你有什么发现,30×2×5=2×1×4=4、连一连5、简算33×15×2125×32×255×2 / 6精品文档×32×56125×483530×= ×16=5×18×45×2125×165+18+525×7×4×4×4×45××25)×40 ××425×50×25×125×116×25×128×5×25×23×125×7×25)×15× ×5)×20× ×25)×4125×5×18+ 1241 是根据加法律和律;×125×=9×,这里运用了乘法律;×4=37×律和律。
练习范围:乘法交换律和结合律题数:100 月日姓名: 分秒成绩:8 ×125 × 8 = 25 × 73 × 4 = 25 × 84 × 4 =86 × 25 × 4 = 88 × 25 × 4 = 17 × 25 × 4 =25 × 47 × 4 = 38 × 25 × 4 = 25 × 25 × 4 = 125 × 5 × 8 = 42 × 25 × 4 = 8000 ÷ 8 ÷ 125 = 3000 ÷ 25 ÷ 4 = 14 × 25 × 4 = 25 × 91 × 4 = 6700 ÷ 25 ÷ 4 = 96 × 25 × 4 = 25 × 87 × 4 = 125 × 2 × 8 = 125 ×15 × 8 = 16000 ÷ 8 ÷ 125 = 13000 ÷ 25 ÷ 4 = 25 × 6 × 4 = 13000 ÷ 8 ÷ 125 = 5 ×125 × 8 = 25 × 66 × 4 = 2000 ÷ 25 ÷ 4 = 12000 ÷125 ÷ 8 = 800 ÷ 25 ÷ 4 = 14 ×125 × 8 =7 ×125 × 8 = 25 × 26 × 4 = 62 × 25 × 4 = 1000 ÷ 8 ÷ 125 = 125 × 8 × 8 = 30 × 25 × 4 =25 × 22 × 4 = 125 ×18 × 8 = 10000 ÷ 8 ÷ 125 = 5600 ÷ 25 ÷ 4 = 52 × 25 × 4 = 76 × 25 × 4 = 10000 ÷ 4 ÷ 25 =18 × 25 × 4 =15000 ÷ 8 ÷ 125 =25 × 59 × 4 = 7800 ÷ 25 ÷ 4 = 6000 ÷ 125 ÷ 8 = 18 ×125 × 8 = 15 ×125 × 8 = 7000 ÷ 125 ÷ 8 = 125 ×16 × 8 = 1000 ÷125 ÷ 8 = 7000 ÷ 25 ÷ 4 = 20000 ÷ 4 ÷ 25 = 19000 ÷ 8 ÷ 125 = 25 × 40 × 4 =25 × 75 × 4 = 13 ×125 × 8 = 11000 ÷ 8 ÷ 125 = 34 × 25 × 4 = 10000 ÷125 ÷ 8 = 20000 ÷125 ÷ 8 = 17000 ÷125 ÷ 8 = 19 ×125 × 8 = 7000 ÷ 8 ÷ 125 = 25 ×12 × 4 = 10 ×125 × 8 = 12000 ÷ 4 ÷ 25 = 2000 ÷125 ÷ 8 = 20000 ÷ 25 ÷ 4 = 3 ×125 × 8 =28 × 25 × 4 = 10000 ÷ 25 ÷ 4 = 3000 ÷ 125 ÷ 8 = 85 × 25 × 4 = 25 × 60 × 4 = 6600 ÷ 25 ÷ 4 = 24 × 25 × 4 = 18000 ÷125 ÷ 8 = 26 × 25 × 4 =20 ×125 × 8 = 6 ×125 × 8 = 125 × 6 × 8 =74 × 25 × 4 = 25 × 48 × 4 = 20000 ÷ 8 ÷ 125 = 125 ×10 × 8 = 19000 ÷125 ÷ 8 = 25 × 98 × 4 = 125 ×17 × 8 = 5900 ÷ 25 ÷ 4 = 8000 ÷ 4 ÷ 25 = 125 ×13 × 8 = 4 ×125 × 8 = 125 × 3 × 8 =12 × 25 × 4 =16 ×125 × 8 =3000 ÷ 4 ÷ 25 = 5500 ÷ 25 ÷ 4 =练习范围:乘法交换律和结合律题数:100 月日姓名: 分秒成绩:25 × 33 × 4 = 13000 ÷125 ÷ 8 = 25 × 79 × 4 =18 × 25 × 4 = 20000 ÷125 ÷ 8 = 34 × 25 × 4 =94 × 25 × 4 = 13 × 25 × 4 = 20 × 25 × 4 =14 × 25 × 4 = 8000 ÷125 ÷ 8 = 125 × 6 × 8 =16 ×125 × 8 = 25 × 58 × 4 = 12000 ÷ 4 ÷ 25 = 12 ×125 × 8 = 8000 ÷ 8 ÷ 125 = 125 ×16 × 8 = 11000 ÷ 8 ÷ 125 = 1000 ÷ 8 ÷ 125 = 8200 ÷ 25 ÷ 4 = 5 × 25 × 4 = 10000 ÷ 25 ÷ 4 = 18000 ÷125 ÷ 8 = 13 ×125 × 8 = 125 × 2 × 8 = 3 × 25 × 4 =800 ÷ 25 ÷ 4 = 62 × 25 × 4 = 10000 ÷ 4 ÷ 25 = 5000 ÷ 4 ÷ 25 = 67 × 25 × 4 = 20 ×125 × 8 = 7000 ÷ 25 ÷ 4 = 2900 ÷ 25 ÷ 4 = 6000 ÷ 125 ÷ 8 = 4000 ÷125 ÷ 8 = 25 × 49 × 4 = 6300 ÷ 25 ÷ 4 = 24 × 25 × 4 = 125 ×18 × 8 = 2000 ÷ 8 ÷ 125 = 2 ×125 × 8 =96 × 25 × 4 =11000 ÷ 25 ÷ 4 =8 ×125 × 8 = 16000 ÷ 8 ÷ 125 = 17 × 25 × 4 = 13000 ÷ 8 ÷ 125 = 6700 ÷ 25 ÷ 4 = 4 ×125 × 8 = 11000 ÷ 4 ÷ 25 = 4000 ÷ 25 ÷ 4 = 125 ×19 × 8 = 3000 ÷ 125 ÷ 8 = 9600 ÷ 25 ÷ 4 = 3 ×125 × 8 = 3000 ÷ 25 ÷ 4 = 25 × 34 × 4 = 25 × 98 × 4 =52 × 25 × 4 = 25 × 59 × 4 = 4000 ÷ 8 ÷ 125 = 15000 ÷ 4 ÷ 25 = 25 × 43 × 4 = 1700 ÷ 25 ÷ 4 = 1000 ÷ 4 ÷ 25 = 25 × 60 × 4 = 18 ×125 × 8 = 56 × 25 × 4 = 7100 ÷ 25 ÷ 4 = 19000 ÷125 ÷ 8 = 2000 ÷ 4 ÷ 25 = 6000 ÷ 4 ÷ 25 = 1600 ÷ 25 ÷ 4 = 11 × 25 × 4 = 8400 ÷ 25 ÷ 4 = 25 × 73 × 4 = 7000 ÷ 125 ÷ 8 = 7000 ÷ 4 ÷ 25 = 6 × 25 × 4 = 9100 ÷ 25 ÷ 4 = 19000 ÷ 4 ÷ 25 = 17 ×125 × 8 = 9000 ÷ 125 ÷ 8 = 19 ×125 × 8 = 25 × 5 × 4 =25 ×12 × 4 = 20000 ÷ 4 ÷ 25 = 125 × 5 × 8 = 10000 ÷ 8 ÷ 125 = 54 × 25 × 4 = 25 × 91 × 4 = 14000 ÷ 4 ÷ 25 = 125 × 4 × 8 = 25 × 92 × 4 =25 × 26 × 4 = 4 × 25 × 4 = 16000 ÷125 ÷ 8 = 15 × 25 × 4 =练习范围:乘法交换律和结合律题数:100 月日姓名: 分秒成绩:10 ×125 × 8 = 28 × 25 × 4 = 6500 ÷ 25 ÷ 4 = 10000 ÷ 25 ÷ 4 = 17000 ÷ 4 ÷ 25 = 15 ×125 × 8 = 12000 ÷125 ÷ 8 = 125 ×16 × 8 = 125 × 20 × 8 = 14000 ÷ 25 ÷ 4 = 8200 ÷ 25 ÷ 4 = 16 ×125 × 8 = 200 ÷ 25 ÷ 4 = 125 ×14 × 8 = 25 × 48 × 4 =9 ×125 × 8 = 125 × 6 × 8 = 25 × 36 × 4 = 125 × 5 × 8 = 125 ×18 × 8 = 25 × 79 × 4 = 25 × 60 × 4 = 125 × 4 × 8 = 25 × 32 × 4 = 3000 ÷ 4 ÷ 25 = 25 × 61 × 4 = 125 × 7 × 8 = 74 × 25 × 4 = 125 ×19 × 8 = 8000 ÷ 8 ÷ 125 = 72 × 25 × 4 = 800 ÷ 25 ÷ 4 = 8 × 25 × 4 =19 ×125 × 8 = 25 × 59 × 4 = 125 × 9 × 8 = 3000 ÷ 25 ÷ 4 = 5 ×125 × 8 = 2 ×125 × 8 =6 ×125 × 8 = 25 × 92 × 4 = 4 ×125 × 8 = 1900 ÷ 25 ÷ 4 =6000 ÷ 125 ÷ 8 =13000 ÷ 4 ÷ 25 =125 ×10 × 8 = 2000 ÷ 4 ÷ 25 = 17 × 25 × 4 = 15000 ÷125 ÷ 8 = 15000 ÷ 4 ÷ 25 = 17 ×125 × 8 = 7000 ÷ 25 ÷ 4 = 10000 ÷ 8 ÷ 125 = 25 × 40 × 4 =20 ×125 × 8 = 8000 ÷ 4 ÷ 25 = 125 ×13 × 8 = 18 × 25 × 4 = 18 ×125 × 8 = 4000 ÷125 ÷ 8 = 4000 ÷ 25 ÷ 4 = 1000 ÷ 8 ÷ 125 = 7300 ÷ 25 ÷ 4 = 1000 ÷125 ÷ 8 = 12000 ÷ 8 ÷ 125 = 19000 ÷125 ÷ 8 = 77 × 25 × 4 = 67 × 25 × 4 = 7000 ÷ 8 ÷ 125 = 5000 ÷ 125 ÷ 8 = 25 × 39 × 4 = 6000 ÷ 8 ÷ 125 = 125 ×12 × 8 = 15000 ÷ 8 ÷ 125 = 25 × 58 × 4 = 16000 ÷ 8 ÷ 125 = 20000 ÷ 4 ÷ 25 = 25 × 43 × 4 = 7000 ÷ 125 ÷ 8 = 25 × 89 × 4 = 25 × 99 × 4 =12 × 25 × 4 = 25 × 26 × 4 = 5100 ÷ 25 ÷ 4 = 5900 ÷ 25 ÷ 4 = 25 × 52 × 4 = 19000 ÷ 8 ÷ 125 = 25 ×17 × 4 = 24 × 25 × 4 = 18000 ÷125 ÷ 8 = 25 ×16 × 4 = 2400 ÷ 25 ÷ 4 = 16000 ÷125 ÷ 8 = 6000 ÷ 4 ÷ 25 = 12 ×125 × 8 = 25 × 73 × 4 =25 × 66 × 4 = 3000 ÷ 125 ÷ 8 = 25 × 34 × 4 =3 ×125 × 8 =练习范围:乘法交换律和结合律题数:100 月日姓名: 分秒成绩:13000 ÷ 8 ÷ 125 = 25 × 79 × 4 = 25 × 23 × 4 = 125 × 5 × 8 = 8000 ÷ 4 ÷ 25 = 40 × 25 × 4 =17 × 25 × 4 = 5000 ÷ 125 ÷ 8 = 25 × 48 × 4 = 125 ×16 × 8 = 25 × 43 × 4 = 25 × 59 × 4 = 19000 ÷125 ÷ 8 = 6000 ÷ 4 ÷ 25 = 25 × 52 × 4 =87 × 25 × 4 = 125 ×19 × 8 = 25 ×19 × 4 = 2000 ÷ 25 ÷ 4 = 7000 ÷ 125 ÷ 8 = 17000 ÷ 8 ÷ 125 = 17000 ÷ 25 ÷ 4 = 51 × 25 × 4 = 9000 ÷ 125 ÷ 8 = 5600 ÷ 25 ÷ 4 = 12 × 25 × 4 = 8 ×125 × 8 =25 × 40 × 4 = 9300 ÷ 25 ÷ 4 = 8200 ÷ 25 ÷ 4 = 10000 ÷ 8 ÷ 125 = 38 × 25 × 4 = 3000 ÷ 25 ÷ 4 = 5 × 25 × 4 = 14 ×125 × 8 = 125 × 9 × 8 =25 × 26 × 4 = 19000 ÷ 4 ÷ 25 = 12 ×125 × 8 = 16000 ÷ 4 ÷ 25 = 5000 ÷ 25 ÷ 4 = 25 × 73 × 4 = 17000 ÷ 4 ÷ 25 =18000 ÷125 ÷ 8 =800 ÷ 25 ÷ 4 =125 × 4 × 8 = 2800 ÷ 25 ÷ 4 = 7000 ÷ 25 ÷ 4 = 19000 ÷ 8 ÷ 125 = 26 × 25 × 4 = 3000 ÷ 125 ÷ 8 = 25 × 27 × 4 = 84 × 25 × 4 = 12000 ÷ 125 ÷ 8 = 25 × 58 × 4 = 4500 ÷ 25 ÷ 4 = 3600 ÷ 25 ÷ 4 = 11000 ÷ 25 ÷ 4 = 20 ×125 × 8 = 77 × 25 × 4 =46 × 25 × 4 = 13000 ÷125 ÷ 8 = 18 × 25 × 4 = 10000 ÷ 4 ÷ 25 = 9500 ÷ 25 ÷ 4 = 24 × 25 × 4 = 125 ×12 × 8 = 15000 ÷ 8 ÷ 125 = 15 ×125 × 8 = 13 ×125 × 8 = 4000 ÷ 25 ÷ 4 = 74 × 25 × 4 =25 × 34 × 4 = 5900 ÷ 25 ÷ 4 = 125 × 20 × 8 = 17 ×125 × 8 = 11000 ÷ 8 ÷ 125 = 8 × 25 × 4 = 15000 ÷125 ÷ 8 = 8000 ÷125 ÷ 8 = 18 ×125 × 8 = 25 × 70 × 4 = 8600 ÷ 25 ÷ 4 = 4 ×125 × 8 = 10000 ÷ 25 ÷ 4 = 6400 ÷ 25 ÷ 4 = 25 × 45 × 4 =96 × 25 × 4 = 72 × 25 × 4 = 9 × 25 × 4 =42 × 25 × 4 = 19000 ÷ 25 ÷ 4 = 16000 ÷ 125 ÷ 8 = 25 × 5 × 4 = 7800 ÷ 25 ÷ 4 = 25 × 91 × 4 = 3000 ÷ 4 ÷ 25 =125 × 2 × 8 =71 × 25 × 4 = 7000 ÷ 4 ÷ 25 =练习范围:乘法交换律和结合律题数:100 月日姓名: 分秒成绩:3000 ÷ 125 ÷ 8 = 25 × 33 × 4 = 14000 ÷125 ÷ 8 = 7000 ÷ 4 ÷ 25 = 2000 ÷ 8 ÷ 125 = 6200 ÷ 25 ÷ 4 = 25 × 75 × 4 = 2600 ÷ 25 ÷ 4 = 25 × 44 × 4 = 125 ×18 × 8 = 25 × 48 × 4 = 12 × 25 × 4 = 2000 ÷125 ÷ 8 = 8800 ÷ 25 ÷ 4 = 13 ×125 × 8 = 85 × 25 × 4 = 7000 ÷ 125 ÷ 8 = 18000 ÷ 8 ÷ 125 = 87 × 25 × 4 = 62 × 25 × 4 = 19000 ÷125 ÷ 8 = 6700 ÷ 25 ÷ 4 = 25 × 58 × 4 = 3900 ÷ 25 ÷ 4 = 96 × 25 × 4 = 19 ×125 × 8 = 8000 ÷125 ÷ 8 = 12000 ÷125 ÷ 8 = 74 × 25 × 4 = 13000 ÷ 4 ÷ 25 = 19000 ÷ 4 ÷ 25 = 1000 ÷ 8 ÷ 125 = 4 ×125 × 8 =8 × 25 × 4 = 7500 ÷ 25 ÷ 4 = 7000 ÷ 8 ÷ 125 = 25 × 92 × 4 = 42 × 25 × 4 = 12 ×125 × 8 = 12000 ÷ 8 ÷ 125 = 6 ×125 × 8 = 125 × 8 × 8 = 125 × 20 × 8 =7 ×125 × 8 =25 × 32 × 4 =5000 ÷ 25 ÷ 4 = 58 × 25 × 4 = 4000 ÷125 ÷ 8 = 10 ×125 × 8 = 11000 ÷125 ÷ 8 = 25 ×12 × 4 = 6000 ÷ 125 ÷ 8 = 11000 ÷ 8 ÷ 125 = 25 ×13 × 4 = 7000 ÷ 25 ÷ 4 = 25 × 49 × 4 = 125 ×11 × 8 = 14 × 25 × 4 = 17000 ÷125 ÷ 8 = 25 × 35 × 4 = 8200 ÷ 25 ÷ 4 = 17000 ÷ 8 ÷ 125 = 20 ×125 × 8 = 11 ×125 × 8 = 6000 ÷ 4 ÷ 25 = 25 × 2 × 4 =125 × 7 × 8 = 125 × 4 × 8 = 10000 ÷ 8 ÷ 125 = 125 × 9 × 8 = 16 ×125 × 8 = 32 × 25 × 4 = 5000 ÷ 125 ÷ 8 = 25 × 28 × 4 = 8000 ÷ 8 ÷ 125 = 54 × 25 × 4 = 6100 ÷ 25 ÷ 4 = 125 ×12 × 8 = 77 × 25 × 4 = 29 × 25 × 4 = 25 × 66 × 4 =66 × 25 × 4 = 25 × 76 × 4 = 25 × 5 × 4 =15 ×125 × 8 = 78 × 25 × 4 = 10000 ÷ 25 ÷ 4 = 1000 ÷ 4 ÷ 25 = 52 × 25 × 4 = 25 × 60 × 4 =17 × 25 × 4 = 14000 ÷ 8 ÷ 125 = 18000 ÷ 125 ÷ 8 = 6400 ÷ 25 ÷ 4 = 11000 ÷ 4 ÷ 25 = 8000 ÷ 4 ÷ 25 = 1000 ÷125 ÷ 8 =2000 ÷ 4 ÷ 25 =3000 ÷ 4 ÷ 25 = 125 × 5 × 8 =练习范围:乘法交换律和结合律题数:100 月日姓名: 分秒成绩:1000 ÷125 ÷ 8 = 18000 ÷125 ÷ 8 = 24 × 25 × 4 =6 ×125 × 8 = 125 ×13 × 8 = 3 × 25 × 4 = 6000 ÷ 8 ÷ 125 = 18000 ÷ 8 ÷ 125 = 25 × 59 × 4 =80 × 25 × 4 = 18 × 25 × 4 = 4 ×125 × 8 = 12000 ÷125 ÷ 8 = 17 ×125 × 8 = 1000 ÷ 4 ÷ 25 = 67 × 25 × 4 = 64 × 25 × 4 = 25 × 34 × 4 =46 × 25 × 4 = 5600 ÷ 25 ÷ 4 = 5 × 25 × 4 =25 × 4 × 4 = 16000 ÷125 ÷ 8 = 125 × 9 × 8 =25 × 73 × 4 = 11000 ÷ 4 ÷ 25 = 65 × 25 × 4 =25 × 49 × 4 = 125 × 6 × 8 = 16000 ÷ 8 ÷ 125 = 7000 ÷ 4 ÷ 25 = 19 ×125 × 8 = 25 ×12 × 4 = 5000 ÷ 125 ÷ 8 = 8000 ÷125 ÷ 8 = 17000 ÷ 8 ÷ 125 = 3000 ÷ 125 ÷ 8 = 12 × 25 × 4 = 125 × 4 × 8 =88 × 25 × 4 = 92 × 25 × 4 = 10000 ÷ 25 ÷ 4 = 87 × 25 × 4 =2600 ÷ 25 ÷ 4 =125 × 2 × 8 =25 × 66 × 4 = 34 × 25 × 4 = 23 × 25 × 4 = 85 × 25 × 4 = 1000 ÷ 8 ÷ 125 = 28 × 25 × 4 = 5000 ÷ 8 ÷ 125 = 25 × 43 × 4 = 125 × 7 × 8 = 20000 ÷ 25 ÷ 4 = 13000 ÷ 8 ÷ 125 = 8000 ÷ 4 ÷ 25 = 16 ×125 × 8 = 3 ×125 × 8 = 1000 ÷ 25 ÷ 4 = 19000 ÷125 ÷ 8 = 54 × 25 × 4 = 125 ×15 × 8 = 25 × 40 × 4 = 18000 ÷ 4 ÷ 25 = 2500 ÷ 25 ÷ 4 = 9 ×125 × 8 = 7000 ÷ 8 ÷ 125 = 12 ×125 × 8 = 91 × 25 × 4 = 16000 ÷ 4 ÷ 25 = 125 ×19 × 8 = 12000 ÷ 4 ÷ 25 = 3900 ÷ 25 ÷ 4 = 3000 ÷ 25 ÷ 4 = 6400 ÷ 25 ÷ 4 = 62 × 25 × 4 = 8 ×125 × 8 = 25 × 92 × 4 = 20000 ÷ 4 ÷ 25 = 25 × 79 × 4 = 25 × 38 × 4 = 3000 ÷ 4 ÷ 25 = 7000 ÷ 25 ÷ 4 = 7000 ÷ 125 ÷ 8 = 25 × 91 × 4 = 4300 ÷ 25 ÷ 4 = 10000 ÷ 4 ÷ 25 = 99 × 25 × 4 = 9000 ÷ 125 ÷ 8 = 17 × 25 × 4 = 19000 ÷ 4 ÷ 25 = 25 × 27 × 4 = 6700 ÷ 25 ÷ 4 = 14000 ÷125 ÷ 8 = 125 ×11 × 8 = 25 × 48 × 4 = 25 × 58 × 4 = 14000 ÷ 4 ÷ 25 = 70 × 25 × 4 =练习范围:乘法交换律和结合律题数:100 月日姓名: 分秒成绩:125 ×18 × 8 = 24 × 25 × 4 = 25 × 72 × 4 = 18000 ÷125 ÷ 8 = 125 × 2 × 8 = 9 ×125 × 8 =27 × 25 × 4 = 5000 ÷ 125 ÷ 8 = 5400 ÷ 25 ÷ 4 = 6000 ÷ 125 ÷ 8 = 25 × 59 × 4 = 54 × 25 × 4 = 125 ×16 × 8 = 3400 ÷ 25 ÷ 4 = 16 ×125 × 8 = 25 × 79 × 4 = 125 ×19 × 8 = 42 × 25 × 4 = 125 × 8 × 8 = 8 × 25 × 4 = 25 × 40 × 4 = 6000 ÷ 4 ÷ 25 = 3000 ÷ 4 ÷ 25 = 3 × 25 × 4 = 13000 ÷ 8 ÷ 125 = 25 × 36 × 4 = 16000 ÷ 8 ÷ 125 = 12 ×125 × 8 = 4000 ÷125 ÷ 8 = 17000 ÷125 ÷ 8 = 12000 ÷ 4 ÷ 25 = 5 × 25 × 4 = 6400 ÷ 25 ÷ 4 = 3 ×125 × 8 = 73 × 25 × 4 = 800 ÷ 25 ÷ 4 = 41 × 25 × 4 = 5 ×125 × 8 = 48 × 25 × 4 = 3000 ÷ 125 ÷ 8 = 9000 ÷ 125 ÷ 8 = 25 × 43 × 4 = 15000 ÷ 8 ÷ 125 =68 × 25 × 4 =13 ×125 × 8 =10000 ÷125 ÷ 8 = 6000 ÷ 8 ÷ 125 = 47 × 25 × 4 =25 × 71 × 4 = 1000 ÷ 25 ÷ 4 = 25 × 48 × 4 =34 × 25 × 4 = 9500 ÷ 25 ÷ 4 = 19 ×125 × 8 = 17 × 25 × 4 = 10000 ÷ 25 ÷ 4 = 8000 ÷ 4 ÷ 25 = 125 ×15 × 8 = 10000 ÷ 4 ÷ 25 = 67 × 25 × 4 = 125 × 5 × 8 = 25 × 74 × 4 = 125 ×10 × 8 = 15000 ÷125 ÷ 8 = 125 ×13 × 8 = 11 ×125 × 8 = 25 × 34 × 4 = 16 × 25 × 4 = 25 × 60 × 4 = 125 × 7 × 8 = 19000 ÷125 ÷ 8 = 8300 ÷ 25 ÷ 4 = 8200 ÷ 25 ÷ 4 = 8 ×125 × 8 = 12 × 25 × 4 = 3000 ÷ 25 ÷ 4 = 17000 ÷ 8 ÷ 125 = 14000 ÷ 8 ÷ 125 = 125 ×17 × 8 = 6700 ÷ 25 ÷ 4 = 84 × 25 × 4 =25 × 80 × 4 = 10000 ÷ 8 ÷ 125 = 12000 ÷ 8 ÷ 125 = 25 × 75 × 4 = 62 × 25 × 4 = 9000 ÷ 8 ÷ 125 = 87 × 25 × 4 = 125 × 6 × 8 = 77 × 25 × 4 =25 × 26 × 4 = 25 ×13 × 4 = 6 ×125 × 8 =25 × 92 × 4 = 46 × 25 × 4 = 7900 ÷ 25 ÷ 4 = 85 × 25 × 4 = 125 × 9 × 8 = 1000 ÷ 8 ÷ 125 = 25 × 98 × 4 =练习范围:乘法交换律和结合律题数:100 月日姓名: 分秒成绩:5 ×125 × 8 = 7000 ÷ 25 ÷ 4 = 9000 ÷ 25 ÷ 4 = 9000 ÷ 125 ÷ 8 = 2000 ÷ 8 ÷ 125 = 74 × 25 × 4 = 6400 ÷ 25 ÷ 4 = 20000 ÷125 ÷ 8 = 25 × 66 × 4 = 13 ×125 × 8 = 51 × 25 × 4 = 19000 ÷ 4 ÷ 25 = 12 ×125 × 8 = 25 × 74 × 4 = 6000 ÷ 4 ÷ 25 = 5000 ÷ 8 ÷ 125 = 5600 ÷ 25 ÷ 4 = 62 × 25 × 4 = 25 × 26 × 4 = 125 × 3 × 8 = 25 × 60 × 4 = 25 × 73 × 4 = 46 × 25 × 4 = 25 × 40 × 4 = 25 × 37 × 4 = 5000 ÷ 125 ÷8 = 25 × 35 × 4 = 4000 ÷ 8 ÷ 125 = 6000 ÷ 125 ÷ 8 = 17 ×125 × 8 = 16000 ÷125 ÷ 8 = 10000 ÷ 8 ÷ 125 = 34 × 25 × 4 = 5800 ÷ 25 ÷ 4 = 15 ×125 × 8 = 25 × 34 × 4 = 24 × 25 × 4 = 6700 ÷ 25 ÷ 4 = 125 ×16 × 8 = 8 × 25 × 4 = 15000 ÷125 ÷ 8 = 25 × 98 × 4 = 77 × 25 × 4 =20 ×125 × 8 =4000 ÷125 ÷ 8 =18 ×125 × 8 = 3000 ÷ 4 ÷ 25 = 25 × 43 × 4 =25 × 91 × 4 = 3000 ÷ 125 ÷ 8 = 90 × 25 × 4 = 16000 ÷ 4 ÷ 25 = 7000 ÷ 8 ÷ 125 = 15000 ÷ 8 ÷ 125 = 18000 ÷125 ÷ 8 = 2000 ÷ 4 ÷ 25 = 4 ×125 × 8 =87 × 25 × 4 = 12000 ÷ 8 ÷ 125 = 800 ÷ 25 ÷ 4 = 10000 ÷125 ÷ 8 = 25 × 88 × 4 = 19 ×125 × 8 = 16 × 25 × 4 = 125 × 2 × 8 = 125 ×14 × 8 = 6100 ÷ 25 ÷ 4 = 96 × 25 × 4 = 7000 ÷ 125 ÷ 8 = 25 × 75 × 4 = 300 ÷ 25 ÷ 4 = 11000 ÷ 4 ÷ 25 = 7800 ÷ 25 ÷ 4 = 125 × 5 × 8 = 55 × 25 × 4 =25 × 92 × 4 = 25 × 6 × 4 = 7 ×125 × 8 =18 × 25 × 4 = 25 × 48 × 4 = 125 × 7 × 8 =11 ×125 × 8 = 1000 ÷ 4 ÷ 25 = 125 ×17 × 8 = 85 × 25 × 4 = 1000 ÷ 8 ÷ 125 = 3300 ÷ 25 ÷ 4 = 25 ×12 × 4 = 16000 ÷ 8 ÷ 125 = 25 × 50 × 4 = 125 × 6 × 8 = 125 ×10 × 8 = 6000 ÷ 25 ÷ 4 = 38 × 25 × 4 = 12000 ÷ 4 ÷ 25 = 2000 ÷125 ÷ 8 = 6 ×125 × 8 =25 × 2 × 4 =2300 ÷ 25 ÷ 4 = 19000 ÷ 8 ÷ 125 =练习范围:乘法交换律和结合律题数:100 月日姓名: 分秒成绩:6000 ÷ 125 ÷ 8 = 10 ×125 × 8 = 1000 ÷ 4 ÷ 25 = 96 × 25 × 4 = 18 ×125 × 8 = 27 × 25 × 4 = 16000 ÷ 8 ÷ 125 = 1100 ÷ 25 ÷ 4 = 7000 ÷ 125 ÷ 8 = 9000 ÷ 125 ÷ 8 = 25 × 46 × 4 = 25 × 40 × 4 = 6000 ÷ 4 ÷ 25 = 5600 ÷ 25 ÷ 4 = 20000 ÷ 25 ÷ 4 = 125 ×11 × 8 = 25 × 53 × 4 = 52 × 25 × 4 = 83 × 25 × 4 = 25 × 48 × 4 = 125 ×15 × 8 = 13 ×125 × 8 = 100 ÷ 25 ÷ 4 = 98 × 25 × 4 = 7000 ÷ 25 ÷ 4 = 18000 ÷125 ÷ 8 = 25 × 24 × 4 = 15000 ÷ 8 ÷ 125 = 24 × 25 × 4 = 1000 ÷125 ÷ 8 = 25 × 59 × 4 = 25 × 55 × 4 = 15 ×125 × 8 = 6400 ÷ 25 ÷ 4 = 8 × 25 × 4 = 54 × 25 × 4 = 25 × 67 × 4 = 16000 ÷ 4 ÷ 25 = 25 × 91 × 4 = 10000 ÷ 25 ÷ 4 = 25 × 34 × 4 = 2000 ÷125 ÷ 8 = 125 × 9 × 8 =1000 ÷ 8 ÷ 125 =125 ×10 × 8 =3000 ÷ 4 ÷ 25 = 34 × 25 × 4 = 3400 ÷ 25 ÷ 4 = 25 × 61 × 4 = 125 ×12 × 8 = 25 × 66 × 4 = 19000 ÷125 ÷ 8 = 3000 ÷ 125 ÷ 8 = 4000 ÷ 8 ÷ 125 = 9200 ÷ 25 ÷ 4 = 25 × 79 × 4 = 7000 ÷ 8 ÷ 125 = 5000 ÷ 8 ÷ 125 = 62 × 25 × 4 = 16 ×125 × 8 = 14 × 25 × 4 = 25 × 56 × 4 = 5000 ÷ 4 ÷ 25 = 19000 ÷ 4 ÷ 25 = 25 × 73 × 4 = 7800 ÷ 25 ÷ 4 = 25 × 20 × 4 = 25 × 76 × 4 = 6 ×125 × 8 = 7000 ÷ 4 ÷ 25 = 85 × 25 × 4 = 125 ×16 × 8 = 8 ×125 × 8 = 9000 ÷ 4 ÷ 25 = 25 × 75 × 4 =17 × 25 × 4 = 125 ×19 × 8 = 5 ×125 × 8 =18 × 25 × 4 = 11000 ÷125 ÷ 8 = 25 × 58 × 4 = 125 × 4 × 8 = 25 × 95 × 4 = 25 × 81 × 4 = 10000 ÷ 4 ÷ 25 = 12000 ÷ 4 ÷ 25 = 25 × 60 × 4 = 17 ×125 × 8 = 11000 ÷ 4 ÷ 25 = 87 × 25 × 4 = 18000 ÷ 4 ÷ 25 = 3000 ÷ 25 ÷ 4 = 125 × 5 × 8 = 25 × 52 × 4 = 8200 ÷ 25 ÷ 4 = 5 × 25 × 4 = 8000 ÷125 ÷ 8 =42 × 25 × 4 =600 ÷ 25 ÷ 4 = 14000 ÷ 4 ÷ 25 =练习范围:乘法交换律和结合律题数:100 月日姓名: 分秒成绩:19 ×125 × 8 = 19000 ÷125 ÷ 8 = 54 × 25 × 4 = 125 ×16 × 8 = 3000 ÷ 125 ÷ 8 = 25 × 82 × 4 = 125 ×10 × 8 = 66 × 25 × 4 = 34 × 25 × 4 = 3700 ÷ 25 ÷ 4 = 25 × 56 × 4 = 15 ×125 × 8 = 14 × 25 × 4 = 6000 ÷ 8 ÷ 125 = 125 ×19 × 8 = 25 × 40 × 4 = 13 ×125 × 8 = 3900 ÷ 25 ÷ 4 = 14000 ÷ 8 ÷ 125 = 8700 ÷ 25 ÷ 4 = 9000 ÷ 25 ÷ 4 = 16000 ÷ 8 ÷ 125 = 24 × 25 × 4 = 2000 ÷ 4 ÷ 25 = 1000 ÷125 ÷ 8 = 25 × 92 × 4 = 18000 ÷125 ÷ 8 = 6600 ÷ 25 ÷ 4 = 18000 ÷ 4 ÷ 25 = 7800 ÷ 25 ÷ 4 = 14000 ÷ 4 ÷ 25 = 87 × 25 × 4 = 5 × 25 × 4 = 15000 ÷ 8 ÷ 125 = 25 × 43 × 4 = 7700 ÷ 25 ÷ 4 = 800 ÷ 25 ÷ 4 = 5000 ÷ 125 ÷ 8 = 46 × 25 × 4 = 125 × 5 × 8 = 7000 ÷ 25 ÷ 4 = 13000 ÷ 8 ÷ 125 = 25 × 98 × 4 =67 × 25 × 4 =125 ×15 × 8 =6700 ÷ 25 ÷ 4 = 125 × 4 × 8 = 39 × 25 × 4 =16 ×125 × 8 = 125 × 3 × 8 = 6000 ÷ 125 ÷ 8 = 1000 ÷ 4 ÷ 25 = 125 ×12 × 8 = 12 ×125 × 8 = 19000 ÷ 8 ÷ 125 = 19000 ÷ 4 ÷ 25 = 7000 ÷ 8 ÷ 125 = 25 × 66 × 4 = 19 × 25 × 4 = 12000 ÷125 ÷ 8 = 25 × 78 × 4 = 8400 ÷ 25 ÷ 4 = 5000 ÷ 8 ÷ 125 = 25 × 58 × 4 = 4400 ÷ 25 ÷ 4 = 17000 ÷ 4 ÷ 25 = 13000 ÷ 4 ÷ 25 = 25 × 73 × 4 = 7 ×125 × 8 = 9000 ÷ 125 ÷ 8 = 4100 ÷ 25 ÷ 4 = 10000 ÷ 25 ÷ 4 = 63 × 25 × 4 = 96 × 25 × 4 = 125 ×11 × 8 = 18 × 25 × 4 = 125 × 8 × 8 = 25 × 34 × 4 = 13000 ÷125 ÷ 8 = 8000 ÷125 ÷ 8 = 83 × 25 × 4 =29 × 25 × 4 = 4300 ÷ 25 ÷ 4 = 6000 ÷ 4 ÷ 25 = 8 ×125 × 8 = 25 × 75 × 4 = 25 × 59 × 4 =17 × 25 × 4 = 20000 ÷ 8 ÷ 125 = 6400 ÷ 25 ÷ 4 = 74 × 25 × 4 = 25 × 49 × 4 = 25 × 48 × 4 =3 ×125 × 8 = 25 × 93 ×4 = 7000 ÷ 4 ÷ 25 = 125 ×13 × 8 = 5 ×125 × 8 = 200 ÷ 25 ÷ 4 = 125 × 2 × 8 =。
乘法交换律与结合律及简便运算练习题1、15X 16=16^口乘法 ------- 侓2、25X 7X 4=DXDX 7 乘法——侓3、(60 X 25) XD =60X ( □X 8) 乘法---侓4、125X (8 XD )=(125 XD ) X 14 乘法一侓5、3X 4X 8X 5=(3 X 4) X ( DX口)乘法一侓二、填合适的数:1 、36X 15=15X ( )2、25X 17X 4=( DX口) X 173、(11 X 25) XD =11X ( DX 4)4、30 X 6X 7=30X ( DX口)三、简便计算:1 、25X 36X 42 、17X 125X 83 、25X 5X 4X 64 、4X 49X 255、15X 22 6 、50X (326X 20) 7 、125X 17X16四、应用题:1 、学校有一幢 5 层教学楼, 每层有12 间教室, 每间教室有 6 个窗户。
整幢楼共有窗户多少个?2、一个游泳池长50 米, 小明每次游 6 个来回她每次游多少米?3、实验小学新盖一幢4层教学楼,每层有5间教室,每间教室要配25套双人座椅,实验小学一共需要购进多少套课座椅?( 您能用两种方法解决不?)4、同学们乘车去参观学习。
每辆车坐50人,用7 辆车送两次才把所有的同学送走, 去参观学习的同学有多少人?5、用拖拉机运化肥, 每辆一次运14袋, 每袋重75 千克,8 辆拖拉机一次可以运化肥多少千克?6、同学们体操表演,一共有8 个方阵,每个方阵有9 行, 每行有25 人, 一共有多少人?7、学校组织同学们去旅游,租了 2 辆汽车,每辆坐24 名学生,租车费一共就是960 元, 进山时, 每人买门票15元,坐索道上山,每人交费25元。
(1) 平均每人分摊多少租车费?(2) 、这次旅游她们一共花费多少元钱?乘法交换律与结合律及简便算法练习题(3)、您还能提出什么问题?。
乘法交换律练习题一、填空题1. 根据乘法交换律,若a × b = 12,则b × a = ________。
2. 计算:5 × 8 = ________,根据乘法交换律,8 × 5 =________。
3. 若3 × m = 27,则m × 3 = ________。
4. 根据乘法交换律,7 × 9 = ________,9 × 7 = ________。
5. 填空:a × b = b × ________。
二、选择题A. 4 × 6 = 6 × 4B. 7 × 5 = 5 × 7C. 8 × 9 ≠ 9 × 8D. 6 × 3 = 3 × 6A. n × 2 = 8B. n × 2 = 16C. n × 2 = 32D. n × 2 = 64A. 5 + 6 = 6 + 5B. 8 × 3 = 3 × 8C. 9 ÷ 3 = 3 ÷ 9D. 4 2 = 2 4三、判断题1. 乘法交换律是指两个数相乘,交换因数的位置,积不变。
()2. 乘法交换律适用于所有的乘法运算。
()3. 当a × b = 0时,根据乘法交换律,b × a = 0。
()4. 乘法交换律可以表示为:a × b = b × a。
()四、应用题1. 小明有4个苹果,他想将每个苹果分给5个朋友,请用乘法交换律计算他需要分几次。
2. 一个长方形的长是8厘米,宽是4厘米,请用乘法交换律计算这个长方形的面积。
3. 小红买了3盒彩笔,每盒有6支,请用乘法交换律计算小红一共买了多少支彩笔。
4. 一个数是5的6倍,请用乘法交换律表示这个数。
五、简答题1. 请解释乘法交换律的意义。
四年级乘法交换律练习题20道一、计算下列各题××25135×6+65××4018×82+18×47+18×71×125×9×45+31×45123×9+12312×7+125二、计算下列各题能简算要简算5×10247×1018×387×1995×201-48×101-3899×201-9 102×83124×25-25×24×25135×6+65××4035×37+65×38× 16×256-16×568×29+38×99+795×425×1995×199+2125×885×3 7+65×8×18×82+18×47+18×71×24+26×20×2+25× ×40三、直接写得数5×4= ×25= 125×8=×125= 0×5=5×12= 12×5= ×50= 0×4= ×50= ×=15×= ×5=6×= ×20= 13×= 四、用简便方法计算9×120+1208×25×8×17×12×8×25×1255×2×5=35××4=60×125×5×8=××4×125×2125×8×2×125×25×6×4125×8× ×68×125×1 16×2125×34×12525×1227×4×523×3=0×5= 13×100= 5×4= 125×8=195×25×42×125×8× 125×489×20×17×2×5×2×110×2+90× × 12×105小四年级上册第三单元周末练习题——乘法交换律与结合律一、仔细想,认真填1、两个数相加,交换加数的,和不变,这叫做。