Odpowiedź:
1 - 7/8 = 8/8 - 7/8 = 1/8
1 - 20/30 = 30/30 - 20/30 = 10/30
1 - 4/7 = 7/7 - 4/7 = 3/7
1 - 3/4 = 4/4 - 3/4 = 1/4
1 - 7/10 = 10/10 - 7/10 = 3/10
1 - 6/11 = 11/11 - 6/11 = 5/11
1 - 5/12 = 12/12 - 5/12 = 7/12
1 - 17/33 = 33/33 - 17/33 = 16/33
Poziom C
11 i 3/4 - 7 i 1/4 = 4 i 2/4
5 i 4/7 - 3 i 2/7 = 2 i 2/7
3 i 33/37 - 1 i 1/37 = 2 i 32/37
3 i 4/9 - 1 i 4/9 = 2
24 i 2/3 - 13 i 1/3 = 11 i 1/3
23 i 19/33 - 1 i 9/33 = 22 i 10/33
9 i 5/12 - 2 i 4/12 = 7 i 1/12
1 i 11/13 - 1 i 1/13 = 10/13
Poziom D
5 - 1/5 = 4 i 5/5 - 1/5 = 4 i 4/5
6 - 13/23 = 5 i 23/23 - 13/23 = 5 i 10/23
2 - 2/7 = 1 i 7/7 - 2/7 = 1 i 5/7
7 - 1/4 = 6 i 4/4 - 1/4 = 6 i 3/4
3 - 2/5 = 2 i 5/5 - 2/5 = 2 i 3/5
4 - 4/11 = 3 i 11/11 - 4/11 = 3 i 7/11
8 - 5/9 = 7 i 9/9 - 5/9 = 7 i 4/9
2 - 4/33 = 1 i 33/33 - 4/33 = 1 i 29/33
