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bestaniboussad
@bestaniboussad
January 2021
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Calculer et donner le résultat des expressions sous la forme. Le plus simple
3/4+1/2
------------
2/5-5/2
3-2/3
----------
4/3* 7
2/3/5/6 -2/5
Pouvez vous m'aidez svp je ne comprend du tout c pour cet aprem DM NOTE
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Lou974
Bonjour,
3/4 + 1/2 = 3/4 + (1*2)/(2*2)
= 3/4 + 2/4
= (3+2)/4
= 5/4
2/5 - 5/2 = (2*2)/(5*2) - (5*5)/(2*5)
= 4/10 - 25/10
= (4-25)/10
= -21/10
3 - 2/3 = (3*3)/(1*3) - 2/3
= 9/3 - 2/3
= (9-2)/3
= 7/3
4/3 * 7 = 28/3
2/3 ÷ 5/6 - 2/5 = 2/3 * 6/5 - 2/5
= (2*3*2)/ (3*5) - 2/5
= 4/5 - 2/5
= (4-2)/5
= 2/5
Voilà, j'espère t'avoir aidé.
0 votes
Thanks 1
bestaniboussad
Es cuse moi j'ai mal écris les première fraction
bestaniboussad
Je vais t'envoyer exercice merci
bestaniboussad
Vous pouvez plus détaillée svp merci
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3/4 + 1/2 = 3/4 + (1*2)/(2*2)
= 3/4 + 2/4
= (3+2)/4
= 5/4
2/5 - 5/2 = (2*2)/(5*2) - (5*5)/(2*5)
= 4/10 - 25/10
= (4-25)/10
= -21/10
3 - 2/3 = (3*3)/(1*3) - 2/3
= 9/3 - 2/3
= (9-2)/3
= 7/3
4/3 * 7 = 28/3
2/3 ÷ 5/6 - 2/5 = 2/3 * 6/5 - 2/5
= (2*3*2)/ (3*5) - 2/5
= 4/5 - 2/5
= (4-2)/5
= 2/5
Voilà, j'espère t'avoir aidé.