25x57-50x28『巧算』
来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/26 23:36:36
25x57-50x28『巧算』25x57-50x28『巧算』25x57-50x28『巧算』25x57-50x28=25x57-25x56=25x(57-56)=25x1=2525x57-50x28=2
25x57-50x28『巧算』
25x57-50x28『巧算』
25x57-50x28『巧算』
25x57-50x28=25x57-25x56=25x(57-56)=25x1=25
25x57-50x28
=25x56+25x1-50x28
=50x28-50x28+25
=25
=25×57-25×2×28
=25×57-25×56
=25×(57-56)
=25×1
=25
50=25*2
所以原式=25*57-25*2*28=25*57-25*56=25
原式=25x57-25x2x28
=25(57-56)
=25
25x57-50x28
=25﹙57-2×28﹚
=25﹙57-56﹚
=25
25x57-50x28『巧算』
x57
( )x28 —( ) =21.6
数学巧算四道题,求帮解:1.125x88+404x25=?2.320x44+68x440=?3.79x79-79+22x79=?4.25x57+25x42+25=?
lingo问题求纠正.min 6x11+2x12+6x13+7x14+4x15+2x16+5x17+9x18+4x21+9x22+5x23+3x24+8x25+5x26+8x27+2x28+5x31+2x32+1x33+9x34+7x35+4x36+3x37+5x38+7x41+6x42+7x43+3x44+9x45+2x46+7x47+1x48+2x51+3x52+9x53+5x54+7x55+2x56+6x57+5x58+5x61+5x62+2x63+2x64+8x65+
找lingo错误MAX 63xl2+76x13+71x23+50x24+85x25+63x34+77x45+39x46+92x47+74x56+89x67st x12+x13+x23+x24+x25+x34+x45+x46+x47+x56+x57
( )+49x( )=24 ( )x28-( )=21.6
谁知道“几X28-几等于21.6”
( )x28-( )=21.6分别填入同一个数
谁知道“几X28-几等于21.6”
下面哪题运用了乘法结合律?A.25x28=25X4x7 B 57X102=57X100+2 C 35X99+35=35X100也是选的A和C,意见不一,这样我还不好选择。
(4分之1-7分1)x28 简便运算
数学题 四年级 7x28+28 的简便算法
2/3x28减19除3/2简便
39.1x2.8+6.09x28的简算
35X28+70用简便算法怎么算
几题应用题和计算题:1.简便计算256X28÷256X28 84X11—78
运用乘法的运算定律计算下面题目34+34x99=?35x35+35x64+35=?173x73-73x73=?98x37=?99x49+49=?125x9-125=?巧算四道题:1.125x88+404x25=?2.320x44+68x440=?3.79x79-79+22x79=?4.25x57+25x42+25=?