(77×63×126)÷(11×21×42)简便运算

问题描述:

(77×63×126)÷(11×21×42)简便运算
脱式计算

(77×63×126)÷(11×21×42)
=(77÷11)×(63÷21)×(126÷42)
=7×3×3
=63