Réponse:
A=7/8 + 2/18
A=7/8 + 1/9
A=7×9/8×9 + 1×8/9×8
A=63/72 + 8/72
A=71/72
voilà :)
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Réponse:
A=7/8 + 2/18
A=7/8 + 1/9
A=7×9/8×9 + 1×8/9×8
A=63/72 + 8/72
A=71/72
voilà :)