Zadanie na ułamkach . POMOCY ! ! ! , Oblicz :
a) 8 : ( -1 3/5) - ( 4 1/2 * 1 2/3 - 3 3/4)
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1/2 * 2 1/2
b) 1/2 - 2/5 : ( 1 2/3 - 2 1/5)
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2/3 * 1 1/2 - 3/4
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