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Laura8
@Laura8
April 2019
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Bonjour , j'ai un devoir maison pour Lundi prochain voici la première parti que j'ai déjà réalisé c'est juste pour être sur
Merci beaucoup
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Ex 2 :
- 5/3 + 5/3
= (- 5 + 5)/3
= 0/3
= 0
2/7 + 3/5
= (2*5)/(7*5) + (3*7)/(5*7)
= 10/35 + 21/35
= 31/35
- 4/5 + 8/15
= (- 4*3)/(5*3) + 8/15
= - 12/15 + 18/15
= 6/15
Ex 3 : Déjà résolu sur l'autre post.
Ex 4 :
4/7 - 5/7 : 3/7
= 4/7 - 5/7 x 7/3
= 4/7 - 35/31
= (4*3)/(7*3) - 35/21
= 12/21 - 35/21
= - 23/21
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Laura8
dans l'exercice 2 ce sont toutes de divisions
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Exercice 16 svp , je ne voit pas comment faire merci :)
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Pouvez vous m'aider je n'y arrive vraiment pas
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- 5/3 + 5/3
= (- 5 + 5)/3
= 0/3
= 0
2/7 + 3/5
= (2*5)/(7*5) + (3*7)/(5*7)
= 10/35 + 21/35
= 31/35
- 4/5 + 8/15
= (- 4*3)/(5*3) + 8/15
= - 12/15 + 18/15
= 6/15
Ex 3 : Déjà résolu sur l'autre post.
Ex 4 :
4/7 - 5/7 : 3/7
= 4/7 - 5/7 x 7/3
= 4/7 - 35/31
= (4*3)/(7*3) - 35/21
= 12/21 - 35/21
= - 23/21