Mathématiques

Question

Bonjour,pouvez-vous m’aidez à l’exercice 6 s’il vous plaît ? Je remercies les personnes qui m’aideront! Merci d’avance!
Bonjour,pouvez-vous m’aidez à l’exercice 6 s’il vous plaît ? Je remercies les personnes qui m’aideront! Merci d’avance!

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  • Bonjour,

    A = 6/5 - 4/7 x 5/2

    A = 6/5 - 20/14

    A = (6 x 14) / (5 x 14) - (20 x 5) / (14 x 5)

    A = 84/70 - 100/70

    A = - 16/70

    A = (2 x - 8) / (2 x 35)

    A = - 8/35

    B = 2/3 - 3/2 x 4/9 + 1/2

    B = 2/3 - 12/18 + 1/2

    B = (2 x 6) / (3 x 6) - 12/18 + (1 x 9) / (2 x 9)

    B = 12/18 - 12/18 + 9/18

    B = 9/18

    B = (9 x 1) / (9 x 2)

    B = 1/2

    C = 3/2 - 1/5 x 25/7

    C = 3/2 - 25/35

    C = (3 x 35) / (2 x 35) - (25 x 2) / (35 x 2)

    C = 105/70 - 50/70

    C = 55/70

    C = (5 x 11) / (5 x 14)

    C = 11/14

    D = (1/2 - 1/3) x (3/4 - 4/3)

    D = [(1 x 3) / (2 x 3) - (1 x 2) / (3 x 2)] x [[3 x 3) / (4 x 3) - (4 x 4) / (3 x 4)]

    D = (3/6 - 2/6) x (9/12 - 16/12)

    D = 1/6 x (- 7/12)

    D = - 7/72

    E = (1/2 - 2/3) x (3/4 + 4/5)

    E = [(1 x 3) / (2 x 3) - (2 x 2) / (3 x 2)] x [(3 x 5) / (4 x 5) + (4 x 4) / (5 x 4)]

    E = (3/6 - 4/6) x (15/20 + 16/20)

    E = - 1/6 x 31/20

    E = - 31/120

    F =(2 - 1/3) x (5 + 5/6)

    F = [(2 x 3) / (1 x 3) - 1/3] x [(5 x 6) / (1 x 6) + 5/6]

    F = (6/3 - 1/3) x (30/6 + 5/6)

    F = 5/3 x 35/6

    F = 175/18

    G = (2/8 - 3/15) : 3/10

    G = [(2 x 15) / (8 x 15) - (3 x 8) / (15 x 8)] : 3/10

    G = (30/120 - 24/120) : 3/10

    G = 6/120 : 3/10

    G = 6/120 x 10/3

    G = 60/360

    G = (60 x 1) / (60 x 6)

    G = 1/6

    H = 2/5 : (3 - 7/10)

    H = 2/5 : [(3 x 10) / (1 x 10) - 7/10]

    H = 2/5 : (30/10 - 7/10)

    H = 2/5 : 23/10

    H = 2/5 x 10/23

    H = 20/115

    H = (5 x 4) / (5 x 23)

    H = 4/23

    I = (5/4 + 2/5) : (2 - 7/5)

    I = [(5 x 5) / (4 x 5) + (2 x 4) / (5 x 4)] : [(2 x 5) / (1 x 5) - 7/5]

    I = (25/20 + 8/20) : (10/5 - 7/5)

    I = 33/20 : 3/5

    I = 33/20 x 5/3

    I = 165/60

    I = (15 x 11) / (15 x 4)

    I = 11/4

    J = (2/3 - 5/2 + 1) : (4/5 - 2/3 + 3/2)

    J = [(2 x 2) / (3 x 2) - (5 x 3) / (2 x 3) + (1 x 6) / (1 x 6)] : [(4 x 6) / (5 x 6) - (2 x 10) / (3 x 10) + (3 x 15) / (2 x 15)]

    J = (4/6 - 15/6 + 6/6) : (24/30 - 20/30 + 45/30)

    J = - 5/6 : 49/30

    J = - 5/6 x 30/49

    J = - 150/294

    J = (6 x - 25) / (6 x 49)

    J = - 25/49

    K = (1/2 + 2/3) : (3/4 - 4/5)

    K = [(1 x 3) / (2 x 3) + (2 x 2) / (3 x 2)] : [(3 x 5) / (4 x 5) - (4 x 4) / (5 x 4)]

    K = (3/6 + 4/6) : (15/20 - 16/20)

    K = 7/6 : - 1/20

    K = 7/6 x - 20

    K = - 140/6

    K = (2 x - 70) / (2 x 3)

    K = - 70/3.

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