Mathématiques

Question

calculer,puis simplifier le résultat.
A:7\24*...
calculer,puis simplifier le résultat. A:7\24*...

0 Commentaire.

1 Réponse

  • a) 7/24 -5/8
    = 7/24  -5 x 3 / 8 x 3
    = 7/24 -15/24
    = -8/24
    = -4 x 2 / 4 x 6
    = -2/6
    = -2 x 1 / 3 x 2
    = -1/3

    b) -5/18 -11/6
    = -5/18 -11 x 3 / 6 x 3
    = -5/18 -33/18
    = -38/18
    = -19 x 2 / 9 x 2
    = -19/9

    c) 11/45 - -5/9
    = 11/45 - -5 x 5 / 9 x 5
    = 11/45 - -25/45
    = 36/45
    = 4 x 9 / 9 x 5
    = 4/5

    d) -8/7 - -10/21
    = -8 x 3 / 7 x 3 - -10/21
    = -24/21 - -10/21
    = -14/21
    = -7 x 2 / 7 x 3
    = -2/3

Autres questions