Odpowiedź:
zad 1
a)
7/9 + 4/9 = 11/9 = 1 2/9
b)
1 2/7 + 5/7 = 1 7/7 = 2
c)
2 2/5 + 3 3/5 = 5 5/5 = 6
d)
1 - 3/5 = 5/5 - 3/5 = 2/5
e)
1 - 6/11 = 11/11 - 6/11 = 5/11
f)
1 - 19/25 = 25/25 - 19/25 = 6/25
g)
4/5 + 2/5 = 6/5 = 1 1/5
h)
3/4 + 3/4 = 6/4 = 1 2/4 = 1 1/2
i)
3/4 - 1/2 = 3/4 - 2/4 = 1/4
j)
8 - 1/4 = 7 4/4 - 1/4 = 7 3/4
k)
5 - 3/7 = 4 7/7 - 3/7 = 4 4/7
l)
10 - 2/5 = 9 5/5 - 2/5 = 9 3/5
m)
5 7/9 - 4 2/9 = 1 5/9
n)
6 - 2 7/8 = 5 8/8 - 2 7/8 = 3 1/8
o)
2 1/5 - 2/5 = 1 6/5 - 2/5 = 1 4/5
