0.79 ×0.46+7.9 ×0.24+11.4×0.079 怎样算简便

问题描述:

0.79 ×0.46+7.9 ×0.24+11.4×0.079 怎样算简便

0.79×0.46+7.9×0.24+11.4×0.079
=0.79×0.46+0.79×2.4+1.14×0.79
=0.79×(0.46+2.4+1.14)
=0.79×4
=3.16