简便计算: 4.7×0.35+0.47×4.2+0.047×23.
问题描述:
简便计算:
4.7×0.35+0.47×4.2+0.047×23.
答
4.7×0.35+0.47×4.2+0.047×23
=4.7×0.35+4.7×0.42+4.7×0.23
=4.7×(0.35+0.42+0.23)
=4.7×1
=4.7.