ile to jest 7 3/11 odjąć 2 9/11 ???
czyli 80/11 - 31/11 = 49/11 = 4 i 5/11
7 3/11 - 2 9/11=4 4/11
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czyli 80/11 - 31/11 = 49/11 = 4 i 5/11
7 3/11 - 2 9/11=4 4/11