Mathématiques

Question

A= ( - 3/4 + 2) x ( 5 + 1/2 )
B= - 4/5 x ( 5/4 + 1 ) - 3/10
C= 3/2 - 1/2 : 1/3 - 1/4
D= - 5/3 + 2/3 : ( - 1 - 1/3 )
Calculer en respectant les priorités et donner le resultat sous la forme la plus simplifiée possible mercii de m' aider

1 Réponse

  • A= ( - 3/4 + 2) x ( 5 + 1/2 )
    A = (- 3/4 + 2 x 2 / 1 x 2) x (5 x 2 / 1 x 2 + 1/2)
    A = (- 3/4 + 4/4) x (10/2 + 1/2)
    A = 1/4 x 11/2
    A = 11/8

    B= - 4/5 x ( 5/4 + 1 ) - 3/10
    B = - 4/5 x (5/4 + 1 x 4 / 1 x 4) - 3 x 2 / 10 x 2
    B = - 4/5 x (5/4 + 4/4) - 6/20
    B = - 4/5 x 9/4 - 6/20
    B = - 36/20 - 6/20
    B = - 42/20
    B = 2 x - 21 / 2 x 10
    B = - 21/10

    C= 3/2 - 1/2 : 1/3 - 1/4
    C = 3/2 - 1/3 x 3/1 - 1/4
    C = 3/2 - 3/3 - 1/4
    C = 3 x 6 / 2 x 6 - 3 x 4 / 3 x 4 - 1 x 3 / 4 x 3
    C = 18/12 - 12/12 - 3/12
    C = 3/12
    C = 3 x 1 / 3 x 4
    C = 1/4

    D= - 5/3 + 2/3 : ( - 1 - 1/3 )
    D = - 5/3 + 2/3 : (- 1 x 3 / 1 x 3 - 1/3)
    D = - 5/3 + 2/3 : (- 3/3 - 1/3)
    D = - 5/3 + 2/3 : - 4/3
    D = - 5/3 + 2/3 x - 3/4
    D = - 5/3 - 6/12
    D = - 5 x 4 / 3 x 4 - 6/12
    D = - 20/12 - 6/12
    D = - 26/12
    D = 2 x - 13 / 2 x 6
    D = - 13/6

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