Mathématiques

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Exercice 54 . Justifier pour les calculs svp
Exercice 54 . Justifier pour les calculs svp

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  • a = 10/3 -1/3 =9/3 = 3

    b = 7/4 -9/8 = 14/8-9/8 = 5/8

    c = (10/12+7/12) x 3/5 = 17/12x3/5 =17/20

    d = 1/6+50/15 = 1/6 +10/3 = 1/6+20/6 = 21/6

    e = (6/15-3/10) x 15/4 = (12/30-9/30) x 15/4 = 3/30x 15/4 = 1/10x15/4 = 15/40= 3/8

    f = 10/9 x18/15 =2/9x18/3 =4/3

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