Fraction 2- 2/7*21/8+1/12
Mathématiques
sarahraynal
Question
Fraction 2- 2/7*21/8+1/12
1 Réponse
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1. Réponse maudmarine
2 - 2/7 x 2/18 + 1/12
= 2 - 54/126 + 1/12
= 2 - 6 x 9 / 6 x 21 + 1/12
= 2 - 54/21 + 1/12
= 2 x 252 / 1 x 252 - 54 x 12 / 21 x 12 + 1 x 21 / 12 x 21
= 504/252 - 648/2
= 352 + 21/252
= - 123/252
= 3 x 41 / 3 x 84
= 41/84