3.2×0.18+0.32×3.9+0.032×43的简便计算

如题所述

第1个回答  2019-03-18
原式=3.2×0.18+3.2×0.39+3.2×0.43
=3.2×(0.18+0.39+0.43)
=3.2×1
=3.2