-3/7-(4/7). -1/9-(+2/9). 5/8-(-7/8)

Question

-3/7-(4/7). -1/9-(+2/9). 5/8-(-7/8)

Answer 1

= - 3/7 - 4/7 = - 7/7 = - 1
= - 1/9 - 2/9 = - 3/9 = - 1/3 (сократили на 3)
= 5/8 + 7/8 = 12/8 = 3/2 (сократили на 4) = 1 целая 1/2