Bonjour j'aurai besoins d'aide en math svp. Calculer en détail. 1. [tex] \frac{11}{6} - ( \frac{ - 3}{4} - \frac{5}{6} )[/tex] 2. [tex]( \frac{4}{21} - \fr

Bonjour

Calculer en détails :

1)

11/6 - (- 3/4 - 5/6)

= (11 x 2) / (6 x 2) - [(- 3 x 3) / (4 x 3) - (5 x 2) / (6 x 2)]

= 22/12 - (- 9/12 - 10/12)

= 22/12 - (- 19/12)

= 22/12 + 19/12

= 41/12

2)

(4/21 - 3/7) - (3/10 - 8/15)

= [4/21 - (3 x 3) / (7 x 3)] - [(3 x 3) / (10 x 3) - (8 x 2) / (15 x 2)]

= (4/21 - 9/21) - (9/30 - 16/30)

= - 5/21 - (- 7/30)

= - 5/21 + 7/30

= (5 x 10) / (21 x 10) + (7 x 7) / (30 x 7)

= 50/210 + 49/210

= 99/210

= (3 x 33) / (3 x 70)

= 33/70.