Odpowiedź:
zad 1
1/2 + 1/4 = 2/4 + 1/4 = 3/4
3/4 - 1/2 = 3/4 - 2/4 = 1/4
3 i 1/2 + 1/4 = 3 i 2/4 + 1/4 = 3 i 3/4
2 i 3/4 - 1/2 = 2 i 3/4 - 2/4 = 2 i 1/4
13 i 3/4 - 5 i 1/2 = 13 i 3/4 - 5 i 2/4 = 8 i 1/4
2 i 1/4 + 7 i 1/2 = 2 i 1/4 + 7 i 2/4 = 9 i 3/4
zad 2
1/4 + 5/8 = 2/8 + 5/8 = 7/8
5/6 - 2/3 = 5/6 - 4/6 = 1/6
zad 3
3/5 + 1/10 = 6/10 + 1/10 = 7/10
2/5 + 1/6 = 12/30 + 5/30 = 17/30
1 i 5/6 + 4 i 1/12 = 1 i 10/12 + 4 i 1/12 = 5 i 11/12
4/5 - 3/10 = 8/10 - 3/10 = 5/10
8/3 - 8/9 = 24/9 - 8/9 = 16/9
2 i 1/2 - 1/4 = 2 i 2/4 - 1/4 = 2 i 1/4
zad 4
1/2 + 1/3 = 3/6 + 2/6 = 5/6
3/4 - 2/3 = 9/12 - 8/12 = 1/12
