Odpowiedź:
a)
8 i 1/2 - 3 = 5 i 1/2
9 i 9/10 - 5 i 3/10 = 4 i 6/10 = 4 i 3/5
8 - 7 i 9/10 = 7 i 10/10 - 7 i 9/10 = 1/10
b)
2 - 5/7 = 1 i 7/7 - 5/7 = 1 i 2/7
5 - 7/13 = 4 i 13/13 - 7/13 = 4 i 6/13
4 i 1/3 - 2/3 = 3 i 4/3 - 2/3 = 3 i 2/3
