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Exercice 97 :
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Enoncé :
Simplifiez les fractions suivantes :
\(\dfrac{63}{84}\)
\(\dfrac{90}{120}\)
\(\dfrac{56}{98}\)
\(\dfrac{81}{108}\)
↓
Solution :
\(\dfrac{63}{84} = \dfrac{21\times 3}{21\times 4} = \dfrac{3}{4}\)
\(\dfrac{90}{120} = \dfrac{30\times 3}{30\times 4} = \dfrac{3}{4}\)
\(\dfrac{56}{98} = \dfrac{14\times 4}{14\times 7} = \dfrac{4}{7}\)
\(\dfrac{81}{108} = \dfrac{27\times 3}{27\times 4} = \dfrac{3}{4}\)