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Ett tal delat med ett bråk

Om ett tal divideras med ett bråk kan vi skriva om detta genom att invertera bråket i nämnaren och multiplicera talet med täljaren t.ex.

3 / \frac{5}{4} = \frac{3 \cdot 4}{5} .

Sambandet kan motiveras med regeln för division av bråk om man skriver om täljaren som ett bråk med nämnaren 1.

3 / \frac{5}{4} = \frac{3}{1} / \frac{5}{4}

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