53.6除以1.6乘2.4简便计算
问题描述：
53.6除以1.6乘2.4简便计算
（2.8+1.2)*1.25的简便计算
答
53.6/1.6×2.4
=53.6×2.4/1.6
=53.6×3/2
=26.8×3
=80.4
(2.8+1.2)×1.25
=4×1.25
=5