(5分之4+3分之2-9分之8)×8分之15

问题描述:

(5分之4+3分之2-9分之8)×8分之15
(12分之7-8分之3)×24÷9分之5
(6.65-5.75)÷4.5+1

(4/5+2/3-8/9)×15/8
=4/5×15/8+2/3×15/8-8/9×15/8
=3/2+5/4-5/3
=13/12
(7/12-3/8)×24÷5/9
=(7/12×24-3/8×24)÷5/9
=(14-9)÷5/9
=5×9/5
=9
(6.65-5.75)÷4.5+1
=0.9÷4.5+1
=1/5+1
=1 1/5