12分之5减(12分之1减2分之1)

问题描述:

12分之5减(12分之1减2分之1)
等于多少?

12分之5减(12分之1减2分之1)
=5/12-(1/12-1/2)
=5/12-1/12+1/2
=5/12-1/12+6/12
=(5-1+6)/12
=10/12
=5/6
六分之五