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Sagot :

[tex] \frac{5}{77} + \frac{4}{7} = \frac{5}{77} + \frac{4 \times 11}{ 7 \times 11} = \frac{5}{77} + \frac{44}{77} = \frac{49}{77} = \frac{7 \times 7}{11 \times 7} = \frac{7}{11} [/tex]

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