Mathématiques

Question

(12x90)+(-7)-(+89)-(-5/6)*56+6,7:(-9)= ?
Aidez moi svp

2 Réponse

  • (12x90)+(-7)-(+89)-(-5/6)*56+6,7:(-9)=

    (1080)-7+89 -140/3 - 6,7/9 =

    1162 - 140/3 - 6,7/9 =

     100313/90
  • (12 x 90) + (- 7) - (+ 89) - (-5/6) * 56 + 6,7 : (- 9)
    = 1080 - 7 - 89 + 5/6 x 56 + 6,7 : - 9
    = 100 - 7 - 89 + 280/6 + 6,7 x - 1/9
    = 100 - 7 - 89 + 280/6 - 6/63
    = 100 x 378 / 1 x 378 - 7 x 378 / 1 x 378 - 89 x 378 / 1 x 378 + 280 x 6 x 63 - 6 x 6 / 63 x 6
    = 37800/378 - 2646/378 - 33642/378 + 1680/378 - 36/378
    = 39480/378 - 36324/378
    = 3156/378
    = 6 x 526 / 6 x 63
    = 526/63

Autres questions