(35.7×12.8×4.2)÷(2.1×5.1×3.2)的简便算法

问题描述:

(35.7×12.8×4.2)÷(2.1×5.1×3.2)的简便算法

(35.7×12.8×4.2)÷(2.1×5.1×3.2)
=(35.7÷5.1)×(12.8÷3.2)×(4.2÷2.1)
=7×4×2
=56