Mathématiques

Question

bonsoir aidez moi svp
(8/5+7/5)×3/5
53/30-6/10+8/10
7/6×(7/2-3/2)
3/7+17/14-23/28

2 Réponse

  • (8/5 + 7/5) x 3/5
    = 15/5 x 3/5
    = (3 x 5 x 3)/(5 x 5)
    = 9/5

    53/30 - 6/10 + 8/10
    = 53/30 - 18/30 + 24/30
    = 59/30

    7/6 x (7/2 - 3/2)
    = 7/6 x 4/2
    = 7/6 x 2
    = 14/6
    = 7/3

    3/7 + 17/14 - 23/28
    = 12/28 + 34/28 - 23/28
    = 23/28

  • A = (8/5 + 7/5) x 3/5
    A = (8 + 7)/5 x 3/5
    A = 15/5 x 3/5
    A = (15 x 3)/(5 x 5)
    A = 45/25
    A = 9/5


    B = 53/30 - 6/10 + 8/10
    B = 53/30 - 18/30 + 24/30
    B = (53 - 18 + 24)/30
    B = (53 - 18 + 24)/30
    B = 59/30


    C = 7/6 x (7/2 - 3/2)
    C = 7/6 x ((7 - 3)/2)
    C = 7/6 x 4/2
    C = 28/12
    C = 7/3


    D = 3/7 + 17/14 - 23/28
    D = 12/28 + 34/28 - 23/28
    D = (12 + 34 - 23)/28
    D = (46 - 23)/28
    D = 23/28


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