Réponse:
1/5+2/3 = 1×3/5×3 + 2×5/3×5 = 3/15 + 10/15 = 13/15
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Réponse:
1/5+2/3 = 1×3/5×3 + 2×5/3×5 = 3/15 + 10/15 = 13/15