37.8X2.8+6.32X28和1.46÷0.4X8.6+4.3X2.7的简便方法
答案:1 悬赏:80
解决时间 2021-01-17 20:10
- 提问者网友:活着好累
- 2021-01-17 10:06
37.8X2.8+6.32X28和1.46÷0.4X8.6+4.3X2.7的简便方法
最佳答案
- 二级知识专家网友:患得患失的劫
- 2021-01-17 11:22
37.8X2.8+6.32X28
=37.8X2.8+63.2X2.8
=(37.8+63.2)X2.8
=(100+1)X2.8
=280+2.8
=282.8
1.46÷0.4X8.6+4.3X2.7
=3.65×4.3×2+4.3×2.7
=4.3×(3.65×2+2.7)
=4.3×10
=43
=37.8X2.8+63.2X2.8
=(37.8+63.2)X2.8
=(100+1)X2.8
=280+2.8
=282.8
1.46÷0.4X8.6+4.3X2.7
=3.65×4.3×2+4.3×2.7
=4.3×(3.65×2+2.7)
=4.3×10
=43
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