闊號7分之5減14分之1加6分之5闊號除42分之5

2022-12-12 01:30

2022-12-12 06:02
(5/7-1/14+5/6)÷5/42
=(5/7-1/14+5/6)×42/5
=5/7×42/5-1/14×42/5+5/6×42/5
=6-3/5+7
=12又2/5
熱門問答