5.6乘以1.25用简便算法怎么算?

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5.6乘以1.25用简便算法怎么算?
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5.6乘以1.25用简便算法怎么算?
5.6乘以1.25用简便算法怎么算?

5.6乘以1.25用简便算法怎么算?
8×1.25×0.7

(7x0.8)X1.25=7x(0.8X1.25)=7X1=1

(6-2/5)*5/4
=6*5/4-(2/5)*(5/4)
=15/2-1/2
=7

5.6乘以1.25
=0.7*8*1.25
=0.7*10
=7

直接丢给cpu去算, 现在的cpu的浮点处理器太强大了, 不比整数慢多少

5.6*(1+0.25)=5.6+5.6/4=5.6+1.4=7