3 5/5 -2 2/5= 1 3/5
2 - 1 5/8= 1 8/8 - 1 5/8= 3/8
5 - 3 1/7= 4 7/7 - 3 1/7 = 1 6/7
3 2/9 - 1 5/6= 3 4/18- 1 15/ 18= 2 22/18 - 1 15/18= 1 7/18
5 2/7 - 2 3/4 = 5 8/28 - 2 21/ 28 = 4 36/28 - 2 21/28= 2 15/28
2 1/3 - 1 5/7= 2 7/21 - 1 15/21 = 1 28/ 21 - 1 15/21= 13/21
Szczegółowe wyjaśnienie:
