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Exercice 100 :
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Enoncé :
Simplifiez les fractions suivantes :
\(\dfrac{120}{180}\)
\(\dfrac{144}{216}\)
\(\dfrac{210}{315}\)
\(\dfrac{154}{308}\)
↓
Solution :
\(\dfrac{120}{180} = \dfrac{60\times 2}{60\times 3} = \dfrac{2}{3}\)
\(\dfrac{144}{216} = \dfrac{72\times 2}{72\times 3} = \dfrac{2}{3}\)
\(\dfrac{210}{315} = \dfrac{105\times 2}{105\times 3} = \dfrac{2}{3}\)
\(\dfrac{154}{308} = \dfrac{154\div 154}{308\div 154} = \dfrac{1}{2}\)