(2+7/5)x5/14怎么算? 谢谢!^_^
问题描述:
(2+7/5)x5/14怎么算? 谢谢!^_^
答
(2+7/5)x5/14
=2*5/14+7/5*5/14
=5/7+1/2
=10/14+7/14
=17/14