Răspuns:
a) 2/7 + 7/7 = 9/7
b) 8/11 + 5/11 = 13/11
c) 33/18 - 10/18 = 23/18
d) 11/4 - 10/4 = 1/4
e) 7/12 - 7/12 = 0/12
f) 3 - 3/4 = 12/4 - 3/4 = 9/4
g) 9/10 - 6/10 = 3/10
h) 22/13 - 7/13 = 15/13
