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Bonjour pouvez-vous m’aider pour le 34 35 s’il vous plaît merci d’avance
Bonjour pouvez-vous m’aider pour le 34 35 s’il vous plaît merci d’avance

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  • Réponse :

    Explications étape par étape

    Bonsoir

    Exercice 34 :

    Calculer :

    A = -1/4 + 11/4

    A = (-1 + 11)/4

    A = 11/4

    B = 2/3 + 5/6

    B = (2 x 2)/(3 x 2) + 5/6

    B = 4/6 + 5/6

    B = (4 + 5)/6

    B = 9/6

    B = (3 x 3)/(2 x 3)

    B = 3/2

    C = 3/4 - 5/6

    C = (3 x 3)/(4 x 3) - (5 x 2)/(6 x 2)

    C = 9/12 - 10/12

    C = (9 - 10)/12

    C = (-1/12)

    D = 4/7 - 3/4

    D = (4 x 4)/(7 x 4) - (3 x 7)/(4 x 7)

    D = 16/28 - 21/28

    D = (16 - 21)/28

    D = (-5)/28

    Exercice 35 :

    Calculer :

    A = 5/6 + 5/12

    A = (5 x 2)/(6 x 2) + 5/12

    A = 10/12 + 5/12

    A = (10 + 5)/12

    A = 15/12

    A = (5 x 3)/(4 x 3)

    A = 5/4

    B = -8/5 - 1/15

    B = (-8 x 3)/(5 x 3) - 1/15

    B = -24/15 - 1/15

    B = (-24 - 1)/15

    B = (-25)/15

    B = (-5 x 5)/(5 x 3)

    B = -5/3

    C = 1/6 - 1/5

    C = (1 x 5)/(6 x 5) - (1 x 6)/(5 x 6)

    C = 5/30 - 6/30

    C = (5 - 6)/30

    C = (-1/30)

    D = -5/7 + 3/2

    D = (-5 x 2)/(7 x 2) + (3 x 7)/(2 x 7)

    D = -10/14 + 21/14

    D = (-10 + 21)/14

    D = 11/14

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