1) 1/2-(+4) 2) -5/11-(-5/11)
3) -5-(-2 1/3)
4) -8-(-1/7)
6) -5/12-(-4)
пошагово
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Пошаговое объяснение:

1) 1/2-(+4) = 1/2+4 = 4 1/2

2) -5/11-(-5/11) = -5/11+5/11 = - (5/11-5/11) = 0

3)-5 - (- 2 1/3) = -5 + 2 1/3 = - (5 - 2 1/3) = -2 2/3

4) -8-(-1/7) = -8 + 1/7 = - (8-1/7) = -7 6/7

6) -5/12 - (-4) = - 5/12+4 = 4 - 5/12 (т.к. 4>5/12) =3 7/12