7.8*1.17-7.8*0.17= (简便计算)
问题描述:
7.8*1.17-7.8*0.17= (简便计算)
答
7.8×1.17-7.8×0.17
= 7.8×(1.17 - 0.17)
= 7.8× 1
= 7.8