Mathématiques

Question

A = 14/21 - 2/5 X 5/3 + 4 X 1/10
HELP ME. Merci

1 Réponse

  • A = 14/21 - 2/5 x 5/3 + 4 x 1/10
    A = 14/21 - 10/15 + 4/10
    A = 14/21 - 10 x 10 / 15 x 10 + 4 x 15 / 10 x 15
    A = 14/21 - 100/150 + 60/150
    A = 14/21 - 10/15 + 6/15
    A = 14 x 15 / 21 x 15 - 10 x 21 / 15 x 21 + 6 x 21 / 15 x 21
    A = 210/315 - 210/315 + 126/315
    A = 126/315
    A = 63 x 2 / 63 x 5
    A = 2/5

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