Răspuns:
Explicație pas cu pas:
a)
-2/7 + 5/7 = 3/7
b)
-4/3 - 70/3 = -74/3
c)
9/4 + 3/4 = 12/4 = 3
d)
1/3 - 1/6 = 2/6 - 1/6 = 1/6
e)
-2/5 + 7/10 = -4/10 + 7/10 = 3/10
f)
5/12 + 1/6 = 5/12 + 2/12 = 7/12
g)
-1/24 - 9/8 = -1/24 - 27/24 = -28/24 = -7/6
h)
4,5 - 1,5 = 3
i)
-7,7 + 2,8 - 9 = -4,9 - 9 = -13,9
