(9.6-21/2除以1.25)除以(4/3乘以75%)简便计算

Question

如题所述

Answer 1

(9.6-21/2除以1.25)除以(4/3乘以75%)
=[9.6-(21/2)÷1.25]÷(4/3X75%)
=[48/5-(21/2)÷(5/4)]÷[(4/3)X(3/4)]
=48/5-(21/2)(4/5)
=48/5-42/5
=6/5
=1又1/5
或1.2