Question

пж помагите решить507

Answer 1

1) ...= -5/3+1/2=-10/6+3/6=-7/6=-1целая1/6
2)...=-5/7+7/7=2/7
3)...=-5целых7/9
4)...=5целых1/7
5)...=-1/4+(-2/4)=-3/4
6)...=-19/5+8/3=-57/15+40/15=-17/15=-1целая2/15