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Exercice 102 :
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Enoncé :
Simplifiez les fractions suivantes :
\(\dfrac{150}{225}\)
\(\dfrac{128}{256}\)
\(\dfrac{350}{700}\)
\(\dfrac{420}{630}\)
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Solution :
\(\dfrac{150}{225} = \dfrac{75\times 2}{75\times 3} = \dfrac{2}{3}\)
\(\dfrac{128}{256} = \dfrac{128\div 128}{256\div 128} = \dfrac{1}{2}\)
\(\dfrac{350}{700} = \dfrac{350\div 350}{700\div 350} = \dfrac{1}{2}\)
\(\dfrac{420}{630} = \dfrac{210\times 2}{210\times 3} = \dfrac{2}{3}\)