Răspuns:
Explicație pas cu pas:
a)
2/3 - 7/5 + 1/15 = 10/15 - 21/15 + 1/15 = -10/15 = -2/3
b)
-1/7 - 3/14 + 1/2 = -2/14 - 3/14 + 7/14 = 2/14 = 1/7
c)
5/8 - 1/2 - 3/4 = 5/8 - 4/8 - 6/8 = -5/8
d)
1/6 + 1/4 + 5/12 - 7/3 = 2/12 + 3/12 + 5/12 - 28/12 = -18/12 = -3/2
