5又14/15-(3又2/15+1又9/10)

问题描述:

5又14/15-(3又2/15+1又9/10)

=5又14/15-3又2/15-1又9/10
=2又12/15-1又9/10
=2又4/5-1又9/10
=2又8/10-1又9/10
=18/10-9/10
=9/10