Mathématiques

Question

aider moi au premier exercice s.v.p
aider moi au premier exercice s.v.p

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1 Réponse

  • A = 3/7 - (2/7*21/8)
    A = 3/7 - (42/56)
    A = 24/56 - 42/56
     A = - 18/56
    A =- 9/28

    B = (3-2/3) / (4/3*7)
    B = (9/3-2/3) / (4/3*7)
    B = (7/3) / 28/3)
    B = 7/3 *3/28
    B = 21/84
    B = 3*7 / 2*2*3*7
    B = 1/4
    C = (5/8+3/2) * 3/2
    C = (5/8 + 12/8) * 3/2
    C = 17/8 * 3/2
    C = 51/16

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