Mathématiques

Question

calculer puis simplifier au maximum. A:7-1/15*5. B:3/14*7/9+25/8*4/15
calculer puis simplifier au maximum. A:7-1/15*5. B:3/14*7/9+25/8*4/15

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2 Réponse

  • A= 7-1/15*5
    A=7-5/15
    A=105/15 - 5/15
    A=100/15

  • A = 7 - 1/15 x 5
    A = 7 - 5/15
    A = 7 x 15 / 1 x 15 - 5/15
    A = 105/15 - 5/15
    A = 100/15
    A = 5 x 20 / 5 x 3
    A = 20/3

    B = 3/14 x 7/9 + 25/8 x 4/15
    B = 21/126 + 100/120
    B = 21 x 1 / 21 x 6 + 20 x 5 / 20 x 6
    B = 1/6 + 5/6
    B = 6/6
    B = 6 x 1 / 6 x 1
    B = 1/1
    B = 1

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