2890/(5/6+7/8+7/10)+1

问题描述:

2890/(5/6+7/8+7/10)+1

2890/(5/6+7/8+7/10)+1
=2890/[1/2*(5/3+7/4+7/5)]+1
=5780/(100/60+105/60+84/60)+1
=5780/(289/60)+1
=20×60+1
=1201