Mathématiques

Question

vous pouvez m'aider svp 9 fois 3/2 -10


(3/2)2 -1/3 fois (-5/2)


3/10 - (4/5+7/2)


8+2 diviser par (-12/5

1 Réponse

  • 9 x 3/2 - 10
    = 27/2 - 10
    = 27/2 - 10 x 2 / 1 x 2
    = 27/2 - 20/2
    = 7/2

    (3/2)² -1/3 x (-5/2)
    = (3²/2²) + 5/6
    = 9/4 + 5/6
    = 9 x 3 / 4 x 3 + 5 x 2 / 6 x 2
    = 27/12 + 10/12
    = 37/12


    3/10 - (4/5+7/2)
    = 3/10 - (4 x 2 / 5 x 2 + 7 x 5 / 2 x 5)
    = 3/10 - (8/10 + 35/10)
    = 3/10 - (43/10)
    = - 40/10
    = 10 x - 4 / 10 x 1
    = - 4

    8+2 : (-12/5)
    = 8 + 2 x - 5/12
    = 8 - 10/12
    = 8 x 12 / 1 x 12 - 10/12
    = 96/12 - 10/12
    = 86/12
    = 2 x 43 / 2 x 6
    = 43/6

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