Odpowiedź:
a)
12/17 + 5/17 = 17/17 = 1
b)
3/6 + 4/6 + 5/6 = 12/6 = 2
c)
9/10 + 8/10 + 7/10 = 24/10 = 2 4/10 = 2 2/5
d)
6 - 2/3 = 5 1/3
e)
8 - 5/6 = 7 1/6
f)
7 - 3/7 = 6 4/7
g)
8 2/5 - 1 3/5 = 7 7/5 - 1 3/5 = 6 4/5
h)
5 4/7 - 2 5/7 = 4 11/7 - 2 5/7 = 2 6/7
i)
9 2/8 - 8 3/8 = 8 10/8 - 8 3/8 = 7/8
j)
2 14/15 + 3 8/15 + 4 1/15 = 9 23/15 = 10 8/15
k)
12 - 1 12/13 + 7/13 = 10 1/13 + 7/13 = 10 8/13
l)
6 4/9 + 2 7/9 - 3 5/9 = 8 11/9 - 3 5/9 = 5 6/9 = 5 2/3
Szczegółowe wyjaśnienie:
