Odpowiedź:
3)
a) 1/5 + 3/10 = 2/10 + 3/10 = 5/10 = 1/2
b) 1/4 + 5/8 = 2/8 + 5/8 = 7/8
c) 1/3 + 4/9 = 3/9 + 4/9 = 7/9
d) 1 i 1/6 + 3 i 5/12 = 1 i 2/12 + 3 i 5/12 = 4 i 17/12 = 5 i 5/12
e) 3/5 - 3/10 = 6/10 - 3/10 = 3/10
f) 7/3 - 7/9 = 21/9 - 7/9 = 14/9 = 1 i 5/9
g) 3 i 1/2 - 1/4 = 3 i 2/4 - 1/4 = 3 i 1/4
h) 5 i 1/3 - 1 i 1/6 = 5 i 2/6 - 1 i 1/6 = 4 i 1/6
Szczegółowe wyjaśnienie:
