Odpowiedź :
a)
8 8/9 + 2 5/9 = 80/9 + 23/9 = 103/9 = 11 4/9
b) 17 1/7 - 8 4/7 = 120/7 - 60/7 = 60/7 = 8 4/7
8 8/9 + 2 5/9 = 80/9 + 23/9 = 103/9 = 11 4/9
b) 17 1/7 - 8 4/7 = 120/7 - 60/7 = 60/7 = 8 4/7