简算:7/31×156 5/23×163 8/19×154 11/43×130 8/29×151 8/29×149(要过程)题是:7/31×156 5/23×163 8/19×154 11/43×130 8/29×151 8/29×149
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/26 03:38:11
![简算:7/31×156 5/23×163 8/19×154 11/43×130 8/29×151 8/29×149(要过程)题是:7/31×156 5/23×163 8/19×154 11/43×130 8/29×151 8/29×149](/uploads/image/z/129334-22-4.jpg?t=%E7%AE%80%E7%AE%97%EF%BC%9A7%2F31%C3%97156+5%2F23%C3%97163+8%2F19%C3%97154+11%2F43%C3%97130+8%2F29%C3%97151+8%2F29%C3%97149%EF%BC%88%E8%A6%81%E8%BF%87%E7%A8%8B%EF%BC%89%E9%A2%98%E6%98%AF%EF%BC%9A7%2F31%C3%97156+5%2F23%C3%97163+8%2F19%C3%97154+11%2F43%C3%97130+8%2F29%C3%97151+8%2F29%C3%97149)
简算:7/31×156 5/23×163 8/19×154 11/43×130 8/29×151 8/29×149(要过程)题是:7/31×156 5/23×163 8/19×154 11/43×130 8/29×151 8/29×149
简算:7/31×156 5/23×163 8/19×154 11/43×130 8/29×151 8/29×149(要过程)
题是:7/31×156 5/23×163 8/19×154 11/43×130 8/29×151 8/29×149
简算:7/31×156 5/23×163 8/19×154 11/43×130 8/29×151 8/29×149(要过程)题是:7/31×156 5/23×163 8/19×154 11/43×130 8/29×151 8/29×149
7/31x156=7/31x(155+1)=7/31x155+7/31=7x5+7/31=35+7/31
5/23x163=5/23x(161+2)=5/23X161+2x5/23=5x7+10/23=35+10/23
8/19x154=8/19(152+2)=8/19x152+2x8/19=8x7+16/19=56+16/19
11/43x130=11/43x(129+1...
全部展开
7/31x156=7/31x(155+1)=7/31x155+7/31=7x5+7/31=35+7/31
5/23x163=5/23x(161+2)=5/23X161+2x5/23=5x7+10/23=35+10/23
8/19x154=8/19(152+2)=8/19x152+2x8/19=8x7+16/19=56+16/19
11/43x130=11/43x(129+1)=11/43x129+11/43=11x3+11/43=33+11/43
8/29x151=8/29x(145+6)=8/29x145+6x8/29=8x5+48/29=40+1+19/29=41+19/29
8/29x149=8/29x(145+4)=8/29x145+4x8/29=40+1+3/29=41+3/29
收起
7/31×156=1092/31
5/23×163=815/23
8/19×154=1232/19
11/43×130 =1430/43
8/29×151= 1208/29
8/29×149=1192/29