Odpowiedź:
zad 12
a) 3 7/8 - 1/4 = 3 7/8 - 2/8 = 3 5/8
b) 6 9/1 - 1/2 = 6 9/16 - 8/16 = 6 1/16
c) 3 7/10 - 1 2/5 = 3 7/10 - 1 4/10 = 3 3/10
d) 6 9/14 - 2 3/7 = 6 9/14 - 2 6/14 = 4 3/14
