Odpowiedź:
a)
3/4 - 1/7 = 21/28 - 4/28 = 17/28
7/10 - 4/15 = 21/30 - 8/30 = 13/30
3/14 - 1/5 = 15/70 - 14/70 = 1/70
b)
2 3/5 - 7/10 = 2 6/10 - 7/10 = 1 16/10 - 7/10 = 1 9/10
2 3/8 - 1 5/6 = 2 9/24 - 1 20/24 = 1 33/24 - 1 20/24 = 13/24
3 1/6 - 2 3/4 = 3 2/12 - 2 9/12 = 2 14/12 - 2 9/12 = 5/12
Szczegółowe wyjaśnienie:
