7.2×8.5+14×0.72+72×0.01(用简便方法做)
问题描述:
7.2×8.5+14×0.72+72×0.01(用简便方法做)
答
=7.2x8.5+7.2x1.4+7.2x0.1
=7.2x(8.5+1.4+0.1)
=7.2x10
=72