Tính

Bài 1: Tính

a.15/7 +3/14 <!--[if gte msEquation 12]>314<!--[endif]--> = .............................................................

 b.9/5 -8/10 <!--[if gte msEquation 12]>810<!--[endif]-->

c.6/11x1/6 <!--[if gte msEquation 12]>16<!--[endif]-->

d.1/8:16/3 <!--[if gte msEquation 12]>163  <!--[endif]-->