Odpowiedź:
a) 5/6 + 2 1/9 = 15/18 + 2 2/18 = 2 17/18
b) 1 2/5 + 2 3/4 = 1 8/20 + 2 15/20 = 3 23/20 = 4 3/20
c) 2/15 + 3 1/6 = 4/30 + 3 5/30 = 3 9/30 = 3 3/10
d) 5 5/12 + 1 4/9 = 5 15/36 + 1 16/36 = 6 31/36
e) 4 7/8 + 7 5/6 = 4 21/24 + 7 20/24 = 7 5/6
f) 13 1/15 + 6 2/25 = 13 5/75 + 6 6/75 = 19 11/75
