52-1.6×2.4的简便算法
问题描述:
52-1.6×2.4的简便算法
答
=52-1.6×(2+0.4)
=52-1.6×2-1.6×0.4(去括号要+号变-号)
=52-3.2-0.64
=52-3.84
=48.16