简算;2.79×5分之8+7.21×160%【要过程】

问题描述:

简算;2.79×5分之8+7.21×160%【要过程】

=2.79×1.6+7.21×4.6
=(2.79+7.21)×1.6
=10×1.6
=16

;2.79×5分之8+7.21×160%
= 2.79 x 8/5 + 7.21 x 8/5
= (2.79+7.21) x 8/5
= 10 x 8/5
=16