(-5/12)+(44/14)、（-28）+3,
问题描述：
(-5/12)+(44/14)、（-28）+3,
答
(-5/12)+(44/14)
=-5/12+22/7
=-35/84+264/84
=229/84
（-28）+3
=-25我打错了，应该是(-5/12)+(44/12）(-5/12)+(44/12）=(44-5)/12=39/12=13/4