Odpowiedź:
a)
2 1/7 + 3/7 = 2 4/7
c)
1 5/11 + 1 3/11 = 2 8/11
e)
3 9/15 + 2 11/15 = 5 20/15 = 6 5/15 = 6 1/3
g)
3 5/8 + 7 5/8 = 10 10/8 = 11 2/8 = 11 1/4
5.
a)
15 5/6 + 1 1/6 = 16 6/6 = 17
b)
5 5/12 + 9 1/12 = 14 6/12 = 14 1/2
c)
12 7/15 + 12 13/15 = 24 20/15 = 25 5/15 = 25 1/3
d)
23 13/20 + 31 17/20 = 54 30/20 = 55 10/20 = 55 1/2
Szczegółowe wyjaśnienie:
