Oblicz:
a) 3/5 + 1/5 + 2/5
7/8 + 1/8 + 5/8
3/4 + 1/4 + 2/4
3/7 + 5/7 + 4/7
b) 1 1/4 + 2 3/4
3 5/6 + 2 1/6
4 1/10 + 3 7/10
2 4/5 + 5 4/5
c) 5/8 - 3/8
3/4 - 1/4
5/6 - 1/6
6/7 - 3/7
d) 1 4/5 - 3/5
2 1/6 - 1 5/6
2 1/4 - 1 3/4
4 1/8 - 2 7/8
PILNE!!!!!!!!!!!!!!!!!!!!!
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a) 3/5 + 1/5 + 2/5=1 1/5
7/8 + 1/8 + 5/8=1 5/8=3 2/8= 3 1/4
3/4 + 1/4 + 2/4=1`2/4= 1 1/2
3/7 + 5/7 + 4/7=1 5/7
b) 1 1/4 + 2 3/4=4
3 5/6 + 2 1/6=6
4 1/10 + 3 7/10=7 8/10=7 4/5
2 4/5 + 5 4/5=8 3/5
c) 5/8 - 3/8=2/8=1/4
3/4 - 1/4=2/4=1/2
5/6 - 1/6=4/6=2/3
6/7 - 3/7=3/7
d) 1 4/5 - 3/5=1 1/5
2 1/6 - 1 5/6=2/6=1/3
2 1/4 - 1 3/4=2/4=1/2
4 1/8 - 2 7/8=1 2/8=1 1/4