4.78×5.12+478×0.318-47.8×2.692
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4.78×5.12+478×0.318-47.8×2.692
咨询记录 · 回答于2022-09-19
4.78×5.12+478×0.318-47.8×2.692
4.78×5.12+478×0.318-47.8×2.692
=4.78×5.12+4.78×31.8-4.78×26.92
=4.78x(5.12+31.8-26.92)
=4.78x(5.12+4.88)
=4.78x10
=47.8
这道题是提取公因数的题
也是小数的扩大与缩小问题
478变4.78
将478乘以0.01
为了总数不变
0.318x100
=31.8