1/(15-5/12-5/13)怎么解

问题描述:

1/(15-5/12-5/13)怎么解

1/(15-5/12-5/13)
=1/5(3-1/12-1/13)
=1/5(468/156-13/156-12/156)
=1/5(443/156)
=156/2215