Odpowiedź:
8/15 + 3/5 = 8/15 + 9/15= 17/15= 1 i 2/15
7/9+ 3/4 = 28/36 + 27/36= 55/36 = 1 i 19/36
3/4 + 4/5 = 15/20 + 16/20 = 31/20 = 1 i 11/20
6 i 5/6 + 4 i 4/9 = 6 i 15/18 + 4 i 8/18 = 10 i 23/18 = 11 i 5/18
4 i 1/6 + 3 i 5/8 = 4 i 4/24 + 3 i 15/24 = 7 i 19/24
Szczegółowe wyjaśnienie: