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Oblicz 2/7+4/7
1 6/16+3 9/16
12/13-5/13
3 7/9-1 3/9
1 1/4+2/7
1 3/5+3 3/4
5 2/3-3 3/5
6 1/8-5 3/4​


Odpowiedź :

6/7
4 15/16
7/13
2 4/9
5/4 + 2/7 = 35/28 + 8/28 = 1 15/28
8/5 + 15/4 = 32/20 + 75/20 = 5 7/20
17/3 - 18/5 = 85/15 - 54/15 = 31/15 = 2 1/15
6 1/8 - 5 6/8 = 5 9/8 - 5 6/8 = 3/8