7.8×6.9+1.2×6.9+6.9的简便计算
问题描述:
7.8×6.9+1.2×6.9+6.9的简便计算
答
(7.8+1.2)×6.9+6.9(7.8+1.2)×6.9+6.9(7.8+1.2)×6.9+6.969
7.8×6.9+1.2×6.9+6.9的简便计算
(7.8+1.2)×6.9+6.9(7.8+1.2)×6.9+6.9(7.8+1.2)×6.9+6.969