Odpowiedź:
7.
a) 6 7/9 - 1/3 = 6 7/9 - 3/9 = 6 4/9
b) 5 1/4 - 5/8 = 5 6/24 - 15/24 = 4 30/24 - 15/24 = 4 15/24 = 4 5/8
c) 1 1/2 - 5/9 = 1 9/18 - 10/18 = 27/18 - 10/18 = 17/18
d) 7 3/4 - 5 7/9 = 7 27/36 - 5 28/36 = 6 63/36 - 5 28/36 = 1 35/36
