Mathématiques

Question

Aider moi svp!!!
Calcule é simplifie au maximum.
Aider moi svp!!! Calcule é simplifie au maximum.

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1 Réponse

  • Bonjour,

    A = - 4/9 + 2/7
    A = - 4 x 7 / 9 x 7 + 2 x 9 / 7 x 9
    A = - 28/63 + 18/63
    A = - 10/63

    B = - 5/ - 9 x - 18/5
    B = 5/9 x - 18/5
    B = - 90/45
    B = 45 x - 2 / 45 x 1
    B = - 2

    C = 1/12 - 5/6
    C = 1/12 - 5 x 2 / 6  x 2
    C = 1/12 - 10/12
    C = - 9/12
    C = 3 x - 3 / 3 x 4
    C = - 3/4

    D = 5/9 : 10/7
    D = 5/9 x 7/10
    D = 35/90
    D = 5 x 7 / 5 x 18
    D = 7/18

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