Odpowiedź:
Szczegółowe wyjaśnienie:
a) 2 5/6 + 1 3/7 = 17/6 + 10/7 = 119/42 + 60/42 = 179/42 = 4 11/42
b) 6 5/8 - 3 1/5 = 53/8 - 16/5 = 265/40 - 128/40 = 137/40 = 3 17/40
c) 4 2/7 - 2 4/9 = 30/7 - 22/9 = 270/63 - 154/63 = 116/63 = 1 53/63
d) 7/12 x 4/5 = 28/60 = 7/15
e) 3/5 : 9/20 = 60/45 = 4/3 = 1 1/3
f) 5 1/2 x 4 2/3 = 11/2 x 14/3 = 154/6 = 77/3 = 25 2/3
