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Sagot :

CT93

Bonjour,

A  = (-9) x 7 + 42 / (-6)

    = -9 x 7 + 42 / -6

    = -63 - 7

    = - 70

B = 21 + (-6) + (-17)

   = 21 - 6 -17

   = 15 - 17

  = -2

C = 4 - 4 ( 7 x 3 - 6)

   = 4 - 4 ( 21 - 6)

   = 4 - 4 (15)

   = 4 - 60

   = -56

D = 4 - 8 x (-5)

  = 4 - 40

  = - 36

Bon courage.

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