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Exercice 101 :
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Enoncé :
Simplifiez les fractions suivantes :
\(\dfrac{250}{400}\)
\(\dfrac{180}{270}\)
\(\dfrac{275}{550}\)
\(\dfrac{320}{480}\)
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Solution :
\(\dfrac{250}{400} = \dfrac{50\times 5}{50\times 8} = \dfrac{5}{8}\)
\(\dfrac{180}{270} = \dfrac{90\times 2}{90\times 3} = \dfrac{2}{3}\)
\(\dfrac{275}{550} = \dfrac{275\div 275}{550\div 275} = \dfrac{1}{2}\)
\(\dfrac{320}{480} = \dfrac{160\times 2}{160\times 3} = \dfrac{2}{3}\)