Odpowiedź:
2.
a) 5/6 + 3/5 = 25/30 + 18/30 = 43/30 = 1 13/30
b) 23 2/3 + 5 7/9 = 23 6/9 + 5 7/9 = 28 13/9 = 29 4/9
c) 2 5/12 + 3/8 = 2 10/24 + 9/24 = 2 19/24
d) 5 7/18 + 2 5/6 = 5 7/18 + 2 15/18 = 7 22/18 = 8 4/18 = 8 2/9
e) 4/7 - 1/3 = 12/21 - 7/21 = 5/21
f) 6 5/12 - 4 5/6 = 6 5/12 - 4 10/12 = 5 17/12 - 4 10/12 = 1 7/12
g) 4 2/7 - 2 = 2 2/7
h) 3 1/3 - 2/5 = 3 5/15 - 6/15 = 2 20/15 - 6/15 = 2 14/15
Szczegółowe wyjaśnienie:
