Mathématiques

Question

Pouvez vous m’aidez à calculer ces fractions.
SVP
Pouvez vous m’aidez à calculer ces fractions. SVP

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2 Réponse

  • Réponse :

    Bonsoir

    Explications étape par étape

    A = 2 + 3/5 : 7/4

    A = 2 + 3/5 * 4/7

    A = 2 + 12/35

    A = 70/35 + 12/35

    A = 82/35

    B = -7/9 - 8/11 : 9

    B = -7/9 - 8/11 * 1/9

    B = -7/9 - 8/99

    B = -77/99 - 8/99

    B = -85/99

    C = 2/3 - 5/3 : 20/21

    C = 2/3 - 5/3 * 21/20

    C = 2/3 - (5*7*3)/(3*5*4)

    C = 2/3 - 7/4

    C = 8/12 - 21/12

    C = -13/12

    D = 7/9 : (1/3 - 2)

    D = 7/9 : ( 1/3 - 6/3)

    D = 7/9 : (-5)/3

    D = 7/9 * (-3)/5

    D = -21/45

    D = (-3 * 7)/(3 * 15)

    D = -7/15

  • Explications étape par étape

    Exercice 27

    A = 2 + 3/5 : 7/4

    A = 2 + 3/5 x 4/7

    A = 2 + 12/35

    A = 70/35 + 12/35

    A = 82/35

    B = - 7/9 - 8/11 : 9

    B = - 7/9 - 8/11 x 1/9

    B = - 7/9 - 8/99

    B = - 77/99 - 8/99

    B = - 85/99

    C = 2/3 - 5/3 : 20/21

    C = 2/3 - 5/3 x 21/20

    C = 2/3 - 105/60

    C = 40/60 - 105/60

    C = - 65/60 = - 13/12

    D = 7/9 : ( 1/3 - 2 )

    D = 7/9 : ( 1/3 - 6/3 )

    D = 7/9 : ( - 5/3 )

    D = 7/9 x ( - 3/5 )

    D = - 21/45 = - 7/15

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