Mathématiques

Question

A= 1/4 + 3/4 x 16/9
B= 6/5 - 17/14 : 5/7
C= (1/7 + 14/3) x 2/-7

1 Réponse

  • A= 1/4 + 3/4 x 16/9A = 1/4 + 48/36
    A = 1 x 9 / 4 x 9 + 48/36
    A = 9/36 + 48/36
    A = 57/36
    A = 3 x 19 / 3 x 12
    A = 19/12

    B= 6/5 - 17/14 : 5/7
    B = 6/5 - 17/14 x 7/5
    B = 6/5 - 119/70
    B = 6 x 14 / 5 x 14 - 119/70
    B = 84/70 - 119/70
    B = - 35/70
    B = 35 x - 1 / 35 x 2
    B = - 1/2

    C= (1/7 + 14/3) x 2/-7
    C = (1 x 3 / 7 x 3 + 14 x 7 / 3 x 7) x - 2/7
    C = (3/21 + 98/21) x - 2/7
    C = 101/21 x - 2/7
    C = - 202/147

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