7.4×0.2+2.4×1.4 用简便运算怎么算?急
问题描述:
7.4×0.2+2.4×1.4 用简便运算怎么算?急
答
7.2×0.2+2.4×1.4
=2.4×0.6+2.4×1.4
=2.4×(0.6+1.4)
=2.4×2
=4.8