小学四年级数学上册乘法交换律和结合律练习
北师大版小学四年级数学上册第三单元乘法交换律和结合律练习
乘法交换律和结合律练习一、计算下列各题（25×125）×（8×4）（4+8）×25 35×37+65×37 135×6+65×6 （43+25）×40 8×（125+7）18×82+18×47+18×712 5×（40－4）16×256－16×56 125×（80+8）69×45+31×45 38×29+38123×99 +123 125 ×7+125 79 ×99+79二、计算下列各题能简算要简算35×102 47×101 25×4445×201－45 98×37 38×101－38 87×199 25×199+25 25×19999×201－99 102×83 125×88124×25－25×24 （80+8）×25 35×37+65×37135×6+65×6 （43+25）×40 8×（125+7）18×82+18×47+18×71 4×24+26×24 30×2+25×2（30×25）×40三、直接写得数25×4= 4×25= 125×8= 8×125= 20×5= 2×50=5×12= 12×5= 4×50= 50×4=（15×25）×4 = 15×（25×4）=（6×12）×5= 6×（12×5）=（13×5）×20= 13×（5×20）=四、用简便方法计算299 ×120+120 38×25×4 8×17×125 4×8×25×12535×2×5=35×（2×）（60×25）×4=60×（×）125×5×8=（×）×5125×32 （8×125）×（4×25）8×4×125×25 125×8×825×6×4 125×8×4 64×125 （25×4）×6125×16 16×25 42×125×8２７×４×５８×（７×２５）２５×１２23×3= 70×5= 13×100=25×4= 125×8=195×25×4 2×125×8×5 125×489×420×17×2×5×2×2 110×2+90×2 （110+90）×212×105反思：通过这节课，我发现学生对用计算器探索规律很感兴趣，学习积极性很高，特别是通过他们自己的努力发现了算式背后的秘密和规律后，他们非常兴奋和开心，就像吃了蜜糖一样，那种成功的喜悦和自豪感非常强。
四年级乘法交换律和结合律强化训练题
小学四年级数学上册乘法交换律与结合律专项训练知识要点：123x 99 +123125 x 7+12579 x 99+79二、计算下列各题能简算要简算35x 10247x 10125x 4498x 37 87x 199 25x 19945x 201－45 38x 101－38 25x 199+2599x 201－99102x 83 125x 88乘法分配律 （a+b ） x c=a x c+b x c 乘法交换律 axb=b x a 一、计算下列各题 乘法结合律 (a >b) X c=a x (b >C) 加法结合律 (a+b)+c=a+(b+c)(25 x 125)x( 8X 4) (4+8)x 25 35x 37+65x 37135x 6+65x 6 43+25)x 40 8x( 125+7)18x 82+18x 47+18x 712 5x( 40－ 4) 16x 256－16 x 56125x( 80+8)69x 45+31 x 45 38x 29+384X 24+26X 24 30X 2+25X 2 (30X 25)X 4033X 15X 2 25 X 7X 4X 325X 50X 8 25 X 125X 16125X 32X 25 4X (25 X 9)16X 25X 12538X 5X 45X (19 X 2) 4X 45X 2525X 23X 8 125 X 72(25 X 125) X 32(30X 25) X 40(15X 25) X 415X (25 X 4)(6 X 12) X 56X (12 X 5)(13X 5) X 205 X (13 X20)125X 4835X 2X 5(60X 25) X 4125X 5X 864X 125125X 3225X 35X 16 125X 24124 X 25-25 X 24 (80+8)X 25 35X 37+65X 37135X 6+65X 643+25)X 40 8X ( 125+7)18X 82+18X 47+18X 71三、直接写得数25 X4= 4 25X 5X2= 12 5= (15X25) X4 =6 X12 X5)=8 125= 20 X5= 50 4=(6 X12) X5=13 (5 X20)=四、用简便方法计算4 X8 X25X12535 X2 X5=35 X( 2 J)125 X5 X8= (__ X_) X5(8 刈25)125 X8 X8 42 XI25 X8 25 X6 X4 (25 X4) X6 8X(7X2 5)125 X32 64 M25 2 5 XI(60X25)i X4=60 X(_ X _) X (4X25)8 X4 X125 X25 125X8 X4125 X16 16 252 2 7X4 X5125X 16 16X 25 56 X12525 X12836 X2525 X 12 25 X 24 X 5 28 X 25299X 120+120 38 X25 X4 8 X17 XI2523 X 3= 70 X5=13X100= 25 X4=125 X8= 125 X8=4 ><50=15X( 25X4)=(13 X5) X20=2 X50=1、 ① （36+64 ） X13 与 ② 36 X13+64 X 132、 ① 135 X 15+65 X 15 与②（135+65 ） X 153、 ① 101 X45 与② 100 X45+1 X 454、 ① 125 X 842 与② 125 X800+125 X 40+125 X2 二、判断下面的 5 组等式，应用乘法分配律用对的打1、 （7+8+9） X 10=7X 10+8X 10+92、 12X 9+3X 9 = 12+3 X 93、 （25+50） X 200 = 25 X 200+504、 101 X 63=100 X 63+635、 98 X 15= 100 X 15 + 2 1X 5） ） （） （）V ；应用错的打 （） （） （） （） ）80+8 ） X 2532 （X 200+3 ）38 39X +383528X + 7020X 17X 2X 5X 2X 21 10 X 2+90 X 2（110+90）X 2 12 X 105乘法分配律练习题 138X 62+38X 38 75X 14—70X 14101X 3812 X 98 55 X 99+55 55X 9912X 29+12 58X 199+58 42X 79+4252X 89 69X 101—69 55X 21—55125X （ 80+8） 125X （ 80X 8）125 X 32X 25乘法分配律练习题 2、选择。
4年级数学乘法交换律和结合律1000题
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 =。
乘法交换律和结合律练习题
乘法交换律和结合律练习题一、仔细想,认真填1、两个数相加,交换加数的,和不变,这叫做。
用字母表示为。
2、三个数相加,先把相加,再与相加;或者先把相加,再与相加,它们的和不变,这叫做。
用字母表示为。
3、两个数相乘,交换乘数的,积不变,这叫做。
用字母表示为。
4、三个数相乘,先把相乘,再与相乘;或者先把相乘,再与相乘,它们的积不变,这叫做。
用字母表示为。
5、73+99+27=99+(73+27) 是根据加法( )律和( )律;9×125×8 =9×(125×8),这里运用了乘法( )律;(25×37)×4=37×(25×4)。
这里运用了乘法( )律和( )律。
6、在○里填>、<或=符号。
125×24○125×8×3 27×4×25○27×(4×25) 67×8○68×77、在□内填上数,在○内填上运算符号,在横线上填上运用的运算定律。
29+37+171=37+(□○□)。
42×5×8=42×(□○□)。
47+□=28○□。
427+39+73=(427+□)○□。
35×21×2=21×(□○□)。
8、计算64×26后,可以交换两个乘数的位置进行验算,是运用了()律。
9、25×(20×39)=(25×20)×39 这是运用了()律。
10、用简便方法计算76+98+24,要先算(),这是根据()律。
二、对号入座:(把正确的答案的序号填在括号里)1、下面一个零也不读的数是( )。
A.600030 B.603000 C.6003002、与480×40的积一样的算式是( )。
A.48×40 B.480×400 C.48×4003、用两个4和三个0可以组成( )个不同的五位数。
小学四年级乘法交换律练习题
小学四年级乘法交换律练习题?坪山二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。
用字母表示为。
2、三个数相加，先把相加，再与相加；或者先把相加，再与2、与480×40的积一样的算式是。
A.48×40B.480×400C.48×4003、用两个4和三个0可以组成个不同的五位数。
A.3B.4C.54、32＋29＋68＋41＝32＋68＋这是根据。
A.加法交换律B.加法结合律C.加法交换律和结合律、49×25×4＝49×这是根据。
A.乘法交换律B.乘法分配律C.乘法结合律：_________号位 ? 座题 _ _ 答 _ _ _ 得_ _ _ ：不名?姓?班_? _ _ _ ?_ _ _ 内：级线班封学密小二?第山 ?坪： ?校?学? ?? 相加，它们的和不变，这叫做。
用字母表示为、下面算式中运用了乘法交换律和结合律。
、两个数相乘，交换乘数的，积不变，这叫做。
用字母A、×12＝47× 表示为。
B、a×b×a×c＝a× 、三个数相乘，先把相乘，再与相乘；或者先把相乘，再与三、计算C、×a×5＝a×相乘，它们的积不变，这叫做。
用字母表示为5、用字母a、b、c表示下面运算定律：1、口算我最棒。
加法交换律；50×70=40×30=5×40= 160×3= 4加法结合律；0×40=200×7= 12×30=2×40= 5乘法交换律；乘法结合律。
25×20=48×20=00×50= 180×6=、73+99+27=99+ 是根据加法律和律；12×3＝320×3＝5×4＝0×2＝×125×=9×，这里运用了乘法律；90×0=0÷5＝00÷4＝18×4＝×4=37×律和律。
小学数学北京版四年级上册第三单元 运算定律乘法交换律和乘法结合律-章节测试习题(1)
章节测试题1.【答题】25×17×4×20×5＝（25×4）×17×（20×5）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【答案】C【分析】此题考查的是乘法运算定律.【解答】乘法交换律：a×b＝b×a，乘法结合律：（a×b）×c＝a×（b×c）.在25×17×4×20×5＝（25×4）×17×（20×5）中，17和4交换了位置，应用了乘法交换律，20和5相乘，应用了乘法结合律.故选C.2.【答题】23×8×5＝23×（8×5），运用了（）.A.乘法交换律B.乘法结合律C.乘法分配律【答案】B【分析】此题考查的是乘法结合律.【解答】三个数相乘，先乘前两个数，或者先乘后两个数，积不变.因此，23×8×5=23×（8×5），运用了乘法结合律.故选B.3.【答题】a×36×b＝（a×b）×______.【答案】36【分析】此题考查的是乘法交换律和乘法结合律.【解答】乘法交换律：两个数相乘，交换两个因数的位置，积不变.乘法结合律：三个数相乘，先乘前两个数，或者先乘后两个数，积不变，所以a×36×b＝（a×b）×36.故答案为36.4.【答题】75×25×4＝75×（______×4）.【答案】25【分析】此题考查的是乘法结合律.【解答】由乘法结合律可知，75×25×4＝75×（25×4）.故答案为25.5.【答题】25×13×4＝13×（25×______）.【答案】4【分析】此题考查的是乘法的交换律和结合律.【解答】根据乘法的交换律和结合律，式子可列为：25×13×4＝13×（25×4）.故答案为4.6.【答题】96×5×20＝96×（5×______）.【答案】20【分析】此题考查的是乘法结合律.【解答】乘法结合律：三个数相乘，先乘前两个数，或者先乘后两个数，积不变.用字母表示为（a×b）×c＝a×（b×c）.所以96×5×20＝96×（5×20）.故答案为20.7.【答题】5×（14×9）＝（5×______）×______.【答案】14 9【分析】此题考查的是乘法结合律.【解答】根据乘法结合律，可以列式：5×（14×9）＝（5×14）×9.故答案为14、9.8.【答题】一篇文稿，刚好打印7页，每页25行，每行20个字.这篇文稿共______字.【答案】3500【分析】此题考查的是乘法结合律.【解答】每页25行，每行20个字，每一页的字数为：25×20＝500（字），刚好打印7页，这篇文稿的字数为：7×500＝3500（字）.列综合算式为：答：这篇文稿共3500字.9.【答题】一辆货车可运55袋化肥，每袋化肥重125千克.8辆这样的货车，一次可运化肥______千克.【答案】55000【分析】此题考查的是乘法结合律.【解答】一辆货车运（125×55）千克，则8辆货车可以运：答：可以运55000千克.10.【答题】我们工厂一月份共生产了25箱零件，已知每箱零件有16盒，每盒有125个零件，一共生产了______个零件.【答案】50000【分析】此题考查的是乘法结合律.【解答】根据题意，总零件个数＝总零件箱数×每箱零件的盒数×每盒零件的个数，因此零件的总个数为：答：一共生产了50000个零件.11.【答题】125×17×8＝125×8×17，这里只运用了乘法结合律. ( )【答案】×【分析】此题考查的是乘法交换律与乘法结合律的运用.【解答】乘法结合律：三个数相乘，先把前两个数相乘，再和另一个数相乘，或先把后两个数相乘，再和另一个数相乘，积不变.乘法交换律：a×b=b×a，此题运用了乘法交换律.故错误.12.【答题】25×180×4＝（25×4）×180. ( )【答案】√【分析】此题考查的是乘法交换律和乘法结合律.【解答】乘法交换律：两个数相乘，交换两个因数的位置，积不变.乘法结合律：三个数相乘，先乘前两个数，或者先乘后两个数，积不变，所以25×180×4＝（25×4）×180.故正确.13.【答题】125×（8×6）＝125×8×125×6. ( )【答案】×【分析】此题考查的是乘法结合律.【解答】乘法结合律：三个数相乘，先乘前两个数，或者先乘后两个数，积不变.用字母表示为（a×b）×c＝a×（b×c），所以125×（8×6）＝125×8×6.故错误.14.【答题】4×8×25×125＝（4×25）+（8×125）. ( )【答案】×【分析】此题考查的是四则运算.【解答】在没有小括号的算式里，只有加、减法或只有乘、除法，都要从左往右按顺序计算.在没有小括号的算式里，如果既有乘、除法，又有加、减法，要先算乘、除法，再算加、减法.算式里有小括号的，要先算小括号里面的，再算小括号外面的.100000≠1100.故错误.15.【答题】4×b×2.5＝4×2.5×（）A.4B.bC.2.5【答案】B【分析】此题考查的是乘法交换律.【解答】4×b×2.5＝4×2.5×b. 故选B.16.【答题】8×23×125＝23×（8×125）运用了乘法（）律和结合律.A.交换B.分配【答案】A【分析】此题考查的是乘法交换律和乘法结合律.【解答】乘法交换律：两个数相乘，交换两个因数的位置，积不变.8×23×125=23×8×125 = 23×（8×125）运用了乘法交换律和结合律. 故选A.17.【答题】下面算式中应用了乘法交换律的是（）.A.a×b＝b×aB.a＋b＝b＋aC.（a×b）×c＝a×（b×c）【答案】A【分析】此题考查的是乘法交换律.【解答】B选项是加法交换律，C选项应用了乘法结合律. 故选A.18.【答题】下面的算式中，运用了乘法结合律的是（）.A.12×7×5＝12×5×7B.7×5×12＝7×（5×12）C.7×（5+12）＝7×5+7×12【答案】B【分析】此题考查的是乘法结合律.【解答】乘法结合律：三个数相乘，先乘前两个数，或者先乘后两个数，积不变.所以7×5×12＝7×（5×12）运用了乘法结合律；A，C选项都没有运用乘法结合律，选B.19.【答题】25×28＝（）A.25×20×8B.25×20+8C.25×4×7【答案】C【分析】此题考查的是乘法结合律.【解答】乘法结合律：三个数相乘，先乘前两个数，或者先乘后两个数，积不变.所以25×28＝25×4×7.选C.20.【答题】在计算36×25时，最简便的方法是（）.A.6×（6×25）B.12×（3×25）C.18×（2×25）D.9×（4×25）【答案】D【分析】此题考查的是乘法结合律.【解答】计算36×25，可以把36看成4×9，利用乘法结合律，先算25×4＝100，再算100×9＝900，即9×（4×25）.选D.。
四年级加法交换和结合律、乘法交换律、结合律、分配律练习
加法交换律、结合律加法交换律：多个加数相加,可以任意交换加数的位置; a＋b=b＋a加法结合律：多个加数相加,可以任意两个加数先加; a＋b＋c= a＋b＋c连减律：连减两个数,可以减去这两个数的和减去两个数的和,可以连减这两个数;a—b—c= a—b＋c 可以任意交换减数的位置;a—b—c= a—c—b598＋99 396—28—22 355＋260＋140＋245 109＋291—176 43＋189＋57 591＋482＋118986＋1999 216＋89＋11 473＋79—63 645—180—245 1022－478－422 987－287＋135 478－256－144 672－36－64 36＋64－36＋64487－287－139－61 500－257－143 2000－368－132 1814－378－422 155＋264＋36＋45 698－291－9568－68＋178 382＋165＋35－82 169＋199184+507 236＋189＋64 759—126—259 569—256—44 514＋189—214 228＋72＋189 28＋45＋72 123＋38＋62 1＋13＋85＋7＋99100－57－23 37＋56＋63＋44 574－3981457－185＋457 68＋24＋32＋76 425＋64＋75＋36235＋102 902－98 634－273＋466－127337＋464＋536 727－194－106 374－35＋174765－96＋65 247－185＋53－15 384－297乘法交换律、结合律乘法交换律：多个因数相乘,可以任意交换因数的位置; a×b=b×a乘法结合律：多个因数相乘,可以任意两个因数先乘; a×b×c= a×b×c25×4=100、125×8=1000连除律：连除以两个数,可以除以这两个数的积除以两个数的积,可以连除以这两个数;a÷b÷c= a÷b ×c可以任意交换除数的位置;a÷b÷c= a÷c÷b35×125×8 97×25×4 1250×24 38×250×4 25×28 25×17×449×4×5 44×25 25×125×8×40125×25×4 5 ×289×2 125×12×8125×64 125×250×32 3×125×80×3 125×18×8 42×125×8 125×88195×25×4 2×1250×8×5 125×489×8125×16 16×25042×125×82000 ÷ 125 ÷ 8 3200 ÷32 ×5 240 ÷24 ×2 270÷9×5 240÷ 5 ÷ 8 600÷24330÷ 5 ÷ 2 540÷54×2 300÷ 25 ÷ 4720÷ 45 350÷ 14 800÷20×8540÷ 5 ÷ 54 480÷32 720÷ 45 ÷ 248×125×9 7800÷78×4 470÷47×2乘法分配律两个数的和或差与一个数相乘,可以把这两个数分别与这个数相乘,再将积相加或相减;正用a±b×c=a×c±b×c两个数分别与同一个数相乘,且积相加或相减,可以把这两个数的和或差与这个数相乘;反用a×c±b×c=a±b×c正用乘法分配律,对算式进行变形4+8×25 43+25×40 8×125+75×40－4 125×80+8 80+8×2543+25×40 8×125+7 40＋8×25125×8+80 36×100+50 24×2＋1086×1000－2 15×40－8 35×100-1200－4×25 125×8+80 57+140×4正用乘法分配律,对算式进行变形135×6+65×6 4×24+26×24 30×2－25×2135×6+65×6 35×37+65×37 16×256－16×56 69×45+31×45 124×25－25×24 135×37+165×37 123×99 +123 299 ×120+120 38×29+38125×7+125 18×82+18×47+18×71 124×36－36×249 ×99+79 25×188+25×12 38×101－3840＋8×25 125×8+80 16×100+5024×2＋10 52×102 28×18－8×28 36×34＋36×66 75×23＋25×23398×25201×25 25×113－325×1348×23+48×26+51×4835×100-1 78×102 56＋56×9969×102 125×79 99×99＋9942×98 25×41 200-4×2556×101 15×40－8 125×8119×16+19×84 31×99 83＋83×9936×198 201×38-3863×43＋57×6375×101－75 125×81－125 91×3193×6＋93×4 102×76 25×34。
乘法交换律和结合律练习题
乘法交换律和结合律练习题乘法交换律和结合律练习题在数学中，乘法交换律和结合律是基本的运算法则。
它们在解决实际问题和简化计算中起着重要的作用。
为了更好地理解和应用这两个法则，我们可以通过一些练习题来加深对它们的理解。
1. 练习题一：乘法交换律(a) 计算：3 × 4 × 5 = ?(b) 将乘法顺序改变后重新计算：4 × 5 × 3 = ?(c) 结果是否相同？为什么？解答：(a) 3 × 4 × 5 = 60(b) 4 × 5 × 3 = 60(c) 结果相同。
根据乘法交换律，乘法的顺序改变不会改变最终的结果。
2. 练习题二：结合律(a) 计算：(2 × 3) × 4 = ?(b) 将括号内的乘法顺序改变后重新计算：2 × (3 × 4) = ?(c) 结果是否相同？为什么？解答：(a) (2 × 3) × 4 = 24(b) 2 × (3 × 4) = 24(c) 结果相同。
根据结合律，无论括号内的乘法顺序如何改变，最终的结果都不会改变。
3. 练习题三：乘法交换律和结合律的综合运用(a) 计算：(5 × 2) × (3 × 4) = ?(b) 将乘法顺序和括号内的乘法顺序改变后重新计算：(4 × 3) × (2 × 5) = ?(c) 结果是否相同？为什么？解答：(a) (5 × 2) × (3 × 4) = 10 × 12 = 120(b) (4 × 3) × (2 × 5) = 12 × 10 = 120(c) 结果相同。
根据乘法交换律和结合律，乘法的顺序和括号内的乘法顺序的改变都不会改变最终的结果。
四年级数学乘法结合律、交换律测试题
四年级乘法结合律和交换律自测题1.3个数相乘，先把前两个数相乘再乘第3个数；或者先把后两个数相乘再与第1个数相乘，（）不变。
这个规律叫做（）。
用字母表示为（）2.乘法交换律用字母表示为（）3. 连一连36×25×8=36×（5×8）乘法交换律x×8=8×x78×4×25=78×(4×25) 乘法结合律（a×8）×25=a×(8×25)7200÷25÷4=7200÷(25×4) 除法的运算性质4.火眼金睛辨对错（1）9×118=118×9 （）（2）720÷8÷2=720÷（8÷2）（）（3）a×b×c=a××b ( )（4）1×6+4×9=1×4+6×9 （）（5）4×6×25=6×（4×25）（）（6）400×（20×4）=400÷20÷4 （）5.用简便方法计算25×32×125 980000÷25÷25÷4÷4 125×7×8 4×（36×25）125×50×8×2360÷（8×9）420÷28 560÷5÷26.为了提高同学们的计算能力，数学老师要求学生3个星期一共完成420到口算题。
平均每天需要做多少道口算题？7.每本相册都是32页，每页可以装6张照片。
我家有900张照片，5本相册够吗？8.小明和小刚从同一地点向相反的方向走去，小明平均每分钟走65米，小刚平均每分钟走74米。
四年级乘法交换律和结合律强化训练题精修订
四年级乘法交换律和结合律强化训练题GE GROUP system office room 【GEIHUA16H-GEIHUA GEIHUA8Q8-小学四年级数学上册乘法交换律与结合律专项训练知识要点：乘法分配律(a+b)×c=a×c+b×c 乘法结合律(a×b)×c=a×(b×c)乘法交换律a×b=b×a 加法结合律 (a+b)+c=a+(b+c)一、计算下列各题（25×125）×（8×4）（4+8）×25 35×37+65×37135×6+65×6 （43+25）×40 8×（125+7）18×82+18×47+18×712 5×（40－4） 16×256－16×56125×（80+8） 69×45+31×45 38×29+38123×99 +123 125 ×7+125 79 ×99+79二、计算下列各题能简算要简算35×102 47×101 25×4498×37 87×199 25×19945×201－45 38×101－38 25×199+2599×201－99 102×83 125×88124×25－25×24 （80+8）×25 35×37+65×37135×6+65×6 （43+25）×40 8×（125+7）18×82+18×47+18×71 4×24+26×24 30×2+25×2 （30×25）×4033×15×2 25×7×4×3 25×50×825×125×16125×32×254×(25×9) 16×25×12538×5×45×(19×2) 4×45×25 25×23×8125×72(25×125)×32 (30×25)×40 (15×25)×415×(25×4)(6×12)×5 6×(12×5) (13×5)×20 5×(13×20)125×48 35×2×5 (60×25)×4 125×5×864×125 125×32 25×35×16 125×24125×16 16×25 56×12525×12836×25 25×12 25×24×5 28×25三、直接写得数25×4= 4×25=125×8=8×125=20×5=5×12= 12×5=4×50=?50×4=2×50=（15×25）×4?= 15×（25×4）= （6×12）×5=6×（12×5）= （13×5）×20= 13×（5×20）=四、用简便方法计算299×120+120 38×25×4?8×17×125?4×8×25×12535×2×5=35×（2×）（60×25）×4=60×（×）125×5×8=（×）×5（8×125）×（4×25）8×4×125×25?125×8×842×125×825×6×4 125×8×4（25×4）×6８×（７×２５）125×16 16×25125×3264×125２５×１２２７×４×５23×3= 70×5=? 13×100=? 25×4=? 125×8=195×25×4 2×125×8×5 125×489×420×17×2×5×2×2110×2+90×2（110+90）×212×105乘法分配律练习题138×62+38×38 75×14—70×14 101×3812×98 55×99+55 55×9912×29+12 58×199+58 42×79+42 52×89 69×101—69 55×21—55125×（80+8） 125×（80×8） 125×32×25 99×99+99 38×7+31×14 25×46+50×27 79×25+22×25—25乘法分配律练习题2一、选择。
青岛版小学数学五四制四年级上册《乘法交换律、结合律》课时练试卷练试卷习题
青岛版小学数学五四制四年级在数学的领域中，提出问题的艺术比解答问题的艺术更为重要。
浩瀚的知识海洋伴你成长，每天都有新的进步！让我们一起快乐的学习吧！《乘法交换律、结合律》基础练习1、我会填。
（1）a×b＝_____×_____（2）（a×b）×c＝a×（_____×_____）（3）5×______＝46×_______（4）45×5×4＝45×（______×_____）（5）125×32×25＝（125×______）×（_____×_______）（6）400×______×8＝400×（15×8）2、算一算，想一想，你有什么发现？（1）30×2×5＝ 30×（2×5）＝（2）35×30×2＝ 30×（35×2）＝我发现：_______________________3、计算下面各题，并用乘法交换律验算。
32×28 45×364、连一连45×18 18＋（55＋45）4×45×25 125×8×2125×16 45×（25×4）45＋18＋55 18×455、简算33×15×2 25×7×4×325×50×8 25×125×166、符合乘法交换律的画○符合结合律的画△（1）35×28＝28×35（）（2）32×25＝8×（4×25）（）（3）25×15×4×2＝（15×2）×（25×4）（）（4） a×b×c＝a×c×b（）7、简算4×（25×9） 16×25×12538×5×4 5×（19×2）125×88 25×23×88、龙口菜市场进了56箱鸡蛋，每箱25千克，每千克鸡蛋8元，这些鸡蛋一共可卖多少钱？9、在学校举行的体操表演中，一共有关5个方阵参加表演，每个方阵有18行，每行都有20 名同学，一共有多少名同学？10、有8个书架，每个书架都有7层，每层可放125 本书，这些书架一共可放多少本书？11、智慧屋2＋4＋6＋8＋…＋98＋10020－19＋18－17＋…＋4－3＋2－1相信自己，就能走向成功的第一步教师不光要传授知识，还要告诉学生学会生活。