-(-2)+1 7/8=2+1 7/8=3 7/8
-1+2 1/9=1 1/9
-4+ 3 1/2=-1/2
-5/7+4/7=-1/7
-5/8+7/8=2/8=1/4
-1/6+1=5/6
5/12+(-1/12)=4/12=1/3
7/15+(-11/15)=-4/15
5/16+(-1/6)=30/96-16/96=14/96=7/48
-(-2)+1 7/8=2+1 7/8=3 7/8
-1+2 1/9=1 1/9
-4+ 3 1/2=-1/2
-5/7+4/7=-1/7
-5/8+7/8=2/8=1/4
-1/6+1=5/6
5/12+(-1/12)=4/12=1/3
7/15+(-11/15)=-4/15
5/16+(-1/6)=30/96-16/96=14/96=7/48