4/7*5+2/7*6+1/7*24的简便计算
问题描述:
4/7*5+2/7*6+1/7*24的简便计算
答
4/7*5+2/7*6+1/7*24
=1/7×(4×5+2×6+2×4)
=1/7×56
=8