1/(2.5+0.75*1.25*8) 巧算

问题描述:

1/(2.5+0.75*1.25*8) 巧算

1/(2.5+0.75*1.25*8)
=1/(2.5+0.75*10)
=1/(2.5+7.5)
=1/10

1/(2.5+0.75*1.25*8)
=1/(2.5+0.75*10)
=1/(2.5+7.5)
=1/10

1/(2.5+0.75*1.25*8
=1/(2.5+0.75*(1.25*8))
=1/(2.5+0.75*10)
=1/(2.5+7.5)
=1/10
=0.1
不懂再问哦