简便运算 9分之4除以[(8分之7减百分之25)除12分之5]
问题描述：
简便运算 9分之4除以[(8分之7减百分之25)除12分之5]
答
(4/9)/[(5/12)/(7/8-25%)]
=(4/9)/[(5/12)/(5/8)]
=(4/9)/(2/3)
=2/3
答
9分之4除以[(8分之7减百分之25)除12分之5]
=4/9÷[(7/8-1/4)÷5/12]
=4/9÷(5/8×12/5)
=4/9÷2/3
=4/9×3/2
=2/3