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Multiplikation og division med videnskabelig notation

For at gøre multiplikation og division nemmere kan du bruge videnskabelig notation. Du kan gange og dividere tallene med samme grundtal og addere eller subtrahere eksponenterne. Med denne metode bliver komplicerede udtryk lavet om til et tal, der er ganget med en 10'er potens. For eksempel 7 gange 10 i femte divideret med 2 gange 10 i minus 2 gange 2,5 gange 10 i niende kan omskrives til 1,4 gange 10 i minus anden. Videnskabelig notation hjælper os med at omskrive lange ligninger, hvori der indgår multiplikation og division af tal med samme grundtal. Lavet af Sal Khan.

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Forstår du engelsk? Klik her for at se flere diskussioner på Khan Academys engelske side.

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