3.23x4.7 32.1x0.53的简算方法
答案:2 悬赏:30 手机版
解决时间 2021-01-19 00:43
- 提问者网友：太高姿态
- 2021-01-18 08:46
3.23x4.7 32.1x0.53的简算方法
最佳答案
- 五星知识达人网友：山君与见山
- 2021-01-18 09:59
3.21乘4.7+32.1乘0.53
=3.21X4.7+3.21X5.3
=3.21X(4.7+5.3)
=3.21x10
=32.1
32.1缩小10倍
0.53扩大10倍
积不变
32.1x0.53=3.21x5.3
同理也可这样转换
3.21X4.7+32.1x0.53
=32.1X0.47+32.1x0.53
=32.1X(0.47+0.53)
=32.1X1
=32.1
=3.21X4.7+3.21X5.3
=3.21X(4.7+5.3)
=3.21x10
=32.1
32.1缩小10倍
0.53扩大10倍
积不变
32.1x0.53=3.21x5.3
同理也可这样转换
3.21X4.7+32.1x0.53
=32.1X0.47+32.1x0.53
=32.1X(0.47+0.53)
=32.1X1
=32.1
全部回答
- 1楼网友：舍身薄凉客
- 2021-01-18 11:01
3.23*4.7
=3.23*5-3.23*0.3
=16.15-0.969
=16.15-1+0.031
=15.15+0.031
=15.181
32.1*0.53
=30*0.53+2*0.53+0.1*0.53
=15.9+1.06+0.053
=16.96+0.053
=17.013
=3.23*5-3.23*0.3
=16.15-0.969
=16.15-1+0.031
=15.15+0.031
=15.181
32.1*0.53
=30*0.53+2*0.53+0.1*0.53
=15.9+1.06+0.053
=16.96+0.053
=17.013
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