Odpowiedź:
a) 11/17 -3/17 = 8/17
5/9 - 1/9 = 4/9
7/16 - 3/16 = 4/16= 1/4
b) 8 3/10 -2/10 = 8 1/10
6 5/8 - 5/8 = 6
1 4/9 - 1/9 = 1 3/9= 1 1/3
c) 4 9/11 - 1 5/11 = 3 4/11
7 13/15 - 6 8/15 = 1 5/15 = 1 1/3
9 7/9 - 5 4/9 = 4 3/9 = 4 1/3
