Mathématiques

Question

Salut, c'est pour un devoir en Mathématique. La consigne est : Calculer en détaillant.
Donc : 
Q= 7sur6 x 7sur5
F= 1sur3 x 7sur2 + 7sur10
J= 4sur3 - 1sur5
B= 5sur6 + 28sur30
M= 3sur5 + 4sur15
D= 1sur3 x (7sur2 + 7sur10) 
Voilà, merci.

2 Réponse

  • Q= 7sur6 x 7sur5
    Q=7/6 x 7/5
    Q=7x7/6x5
    Q=49/30

    F= 1sur3 x 7sur2 + 7sur10
    F=1/3x7/2 +7/10
    F=7/6+7/10
    F=7x5/6x5+7x3/10x3
    F=35/30+21/30
    F=56/30
    F=2x28/15x2
    F=28/15

    J= 4sur3 - 1sur5
    J=4/3-1/5
    J=4x5/5x3-3/5x3
    J=20/15-3/15
    J=17/15

    B= 5sur6 + 28sur30
    B=5/6+28/30
    B=5x5/6x5+28/30
    B=25/30+28/30
    B=53/30

    M= 3sur5 + 4sur15
    M=3/5+4/15
    M=3x3/3x5+4/15
    M=9/15+4/15
    M=13/15

    D= 1sur3 x (7sur2 + 7sur10) 
    D=1/3x(7/2+7/10)
    D=1/3(7x5/2x5+7/10)
    D=1/3(35/10+7/10)
    D=1/3(42/10)
    D=14x3/3x10
    D=14/10
  • Q = 7/6 x 7/5
    Q = 7 x 7
           6 x 5
    Q = 49/30

    F = 1/3 x 7/2 + 7/10
    F = 1 x 7 + 7/10
           3 x 2
    F = 7/6 + 7/10
    F = 7 x 5 / 6 x 5 + 7 x 3 / 10 x 3
    F = 35/30 + 21/30
    F = 56/30
    F = 2 x 28 / 2 x 15
    F = 28/15

    J = 4/3 - 1/5
    J = 4 x 5 / 3 x 5 - 1 x 3 / 5 x 3
    J = 20/15 - 3/15
    J = 17/15

    B = 5/6 + 28/30
    B = 5 x 5 / 6 x 5 + 28/30
    B = 25/30 + 28/30
    B = 53/30

    M = 3/5 + 4/15
    M = 3 x 3 / 5 x 3 + 4/15
    M = 9/15 + 4/15
    M = 13/15

    D = 1/3 x (7/2 + 7/10)
    D = 1/3 x (7 x 5 / 2 x 5 + 7/10)
    D = 1/3 x (35/10 + 7/10)
    D = 1/3 x 42/10
    D = 1 x 42
           3 x 10
    D = 42/30
    D = 6 x 7 / 6 x 5
    D = 7/5

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