Ki peut m'aider merci​

Bonsoir,

a = 3/4 ; b = 2/3 ; c = 4/5

Calculer a + bc

3/4 + 2/3 * 4/5

= 3/4 + 8/15

= (3 x 15) / (4 x 15) + (8 x 4) / (15 x 4)

= 45/60 + 32/60

= 77/60

Calculer

(c - a) * b

(4/5 - 3/4) * 2/3

= [(4 x 4) / (5 x 4) - (3 x 5) / (4 x 5)] * 2/3

= (16/20 - 15/20) * 2/3

= 1/20 * 2/3

= 1/60

Calculer

abc

= 3/4 * 2/3  * 4/5

= 6/12 * 4/5

= 24/60

= (12 x 2) / (12 x 5)

= 2/5.