Odpowiedź :
a)
2 3/4 + 3 2/3 = 2 9/12 + 3 8/12 = 5 17/12 = 6 5/12
b)
6 2/7 - 2 2/5 = 6 10/35 - 2 14/35 = 5 45/35 - 2 14/35 = 3 31/35
a)
2 3/4 + 3 2/3 = 2 9/12 + 3 8/12 = 5 17/12 = 6 5/12
b)
6 2/7 - 2 2/5 = 6 10/35 - 2 14/35 = 5 45/35 - 2 14/35 = 3 31/35