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Pomocy na teraz
2/3 + 3/7 =
2/4 + 3/7 =
2/3 × 2/4 =
1 1/2 × 2/3 =
1/2 : 2/3 =
1 1/2 : 2/3 =
1 5/2 : 1 3/10 =