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Fredericcadot
@Fredericcadot
May 2019
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Bonjour pouvez vous encore m'aider ? Ecrire sous forme de fraction irréductible A = -1/2 + 5/2 x (1-1/2) et B = 5/7 : 6/7-(1/2-1)
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Sulky
Verified answer
Bonjour,
A = - 1/2 + 5/2 x (1 - 1/2)
A = - 1/2 + 5/2 x (2/2 - 1/2)
A = - 1/2 + 5/2 x 1/2
A = - 1/2 + 5/4
A = - 2/4 + 5/4
A = 3/4
B = 5/7 : 6/7 - (1/2 - 1)
B = 5/7 x 7/6 - (1/2 - 2/2)
B = 5/6 - (- 1/2)
B = 5/6 + 1/2
B = 5/6 + 3/6
B = 8/6
B = 4/3
3 votes
Thanks 1
fredericcadot
Eh bien j'aimerai t'avoir comme prof, merci infiniment car en plus suis très malade..merci merci merci
Sulky
Haha, et bien je t'en prie, bon courage pour la suite et bon rétablissement, bye :)
Commentaires
-1/2 + 5/2 * (1 - 1/2) = -1/2 + 5/2 * 1/2 = -1/2 + 5/4 = -2/4 + 5/4 = 3/4
5/7 : 6/7 - (1/2 - 1) = 5/7 * 7/6 + 1/2 = 35/42 + 21/42 = 56/42 = 28/21 = 4/3
2 votes
Thanks 1
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Verified answer
Bonjour,A = - 1/2 + 5/2 x (1 - 1/2)
A = - 1/2 + 5/2 x (2/2 - 1/2)
A = - 1/2 + 5/2 x 1/2
A = - 1/2 + 5/4
A = - 2/4 + 5/4
A = 3/4
B = 5/7 : 6/7 - (1/2 - 1)
B = 5/7 x 7/6 - (1/2 - 2/2)
B = 5/6 - (- 1/2)
B = 5/6 + 1/2
B = 5/6 + 3/6
B = 8/6
B = 4/3
5/7 : 6/7 - (1/2 - 1) = 5/7 * 7/6 + 1/2 = 35/42 + 21/42 = 56/42 = 28/21 = 4/3