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mllechouette
@mllechouette
June 2021
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calculer les expressions et donner le résultat sous la forme la plus simple
19 ) a)-3/4/5 b) -3/4/5 c) 1/-6/12 d) 1/-6/12
62) calculer et donner le résultat des expressions sous la forme la plus simple :
A) -3/4 +1/2 / 2/5 - 5/2 B) 3-2/3 / 4/3 x 7 C) 2/3/5/6 - 2/5
merci de votre aide
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tommus
Exercice n°19 :
a) -3/4/5 = -3/4 x 1/5 = (-3x1)/(4x5) = -3/20
b) idem
c) 1/-6/12 = 1/-6 x 1/12 = (1x1)/(-6x12) = 1/-72
d) idem
Exercice n°62 :
a) -3/4 + 1/2 / 2/5 - 5/2 = -3/4 + 1/2 x 5/2 - 10/4 = -3/4 - 10/4 + 5/4 = -8/4 = -4/2 = -2
b) 3 - 2/3 / 4/3 x 7 = 3 - 2/3 x 3/4 x 7 = 3 - 6/12 x 7 = 3 - 42/12 = 36/12 - 42/12 = -6/12 = -0,5
c) 2/3/5/6 - 2/5 = 2/3 x 6/5 - 2/5 = 12/15 - 6/15 = 6/15 = 2/5
1 votes
Thanks 2
mllechouette
merci
tommus
De rien :)
mllechouette
^^
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a) -3/4/5 = -3/4 x 1/5 = (-3x1)/(4x5) = -3/20
b) idem
c) 1/-6/12 = 1/-6 x 1/12 = (1x1)/(-6x12) = 1/-72
d) idem
Exercice n°62 :
a) -3/4 + 1/2 / 2/5 - 5/2 = -3/4 + 1/2 x 5/2 - 10/4 = -3/4 - 10/4 + 5/4 = -8/4 = -4/2 = -2
b) 3 - 2/3 / 4/3 x 7 = 3 - 2/3 x 3/4 x 7 = 3 - 6/12 x 7 = 3 - 42/12 = 36/12 - 42/12 = -6/12 = -0,5
c) 2/3/5/6 - 2/5 = 2/3 x 6/5 - 2/5 = 12/15 - 6/15 = 6/15 = 2/5