Odpowiedź:
zad 3
3/8 + 5/8 = 1
3/11 + 8/11 = 1
3/4 + 1/4 = 1
39/50 + 11/50 = 1
4/7 + 3/7 = 1
7/10 + 3/10 = 1
2/15 + 6/15 + 7/15 = 1
zad 4
3/7 + 6/7 = 9/7 = 1 i 2/7
5/7 + 7/8 = 12/8 = 1 i 4/8
10/11 + 6/11 = 16/11 = 1 i 5/11
zad 5
1 i 3/8 + 2 i 1/8 = 3 i 4/8