Mathématiques

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Bonjour pouvez-vous m’aider svp exercice 67
Bonjour pouvez-vous m’aider svp exercice 67

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2 Réponse

  • bonsoir


    A = 2/7 - 42/63 = 18/63 - 42/63 =  - 24/63 = - 8/21

    B = - 7/8 x ( 2/3 - 3/3) = - 7/8 x - 1/3 = 7/24

    C = 4/20 + 2/5 = 4/20 + 8/20 = 48/20 =  12/5

  • Bonsoir,

    A= 2/7-(3/7 x 14/9)=  2/7 - (1 x 2/3) = 2/7 - 2/3= (2 x3 - 2 x 7) / (7 x 3)= -8/21

    B = - 7/8 x ( 2 - 1 x 3)/3 = -7/8(-1/3)= 7/24

    C = (4x1) / (5x4) +2/5= 4/20 +2/5= (4 + 2 x 4)/ 20=  12/5

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