3. Calculer avec les quotients Calculer chacune des expressions suivantes [tex]1 \frac{ - 7}{3} [/tex] [tex] \frac{ - 2}{10} + \frac{7}{25} [/tex] [tex] \frac

Bonjour

1 - 7/3

= (1 x 3) / (1 x 3) - 7/3

= 3/3 - 7/3

= - 4/3

- 2/10 + 7/25

= (- 2 x 5) / (10 x 5) + (7 x 2) / (25 x 2)

= - 10/50 + 14/50

= 4/50

= (2 x 2)  (2 x 25)

= 2/25

- 7/15 x (- 5/21)

= 35/315

= (35 x 1) / (35 x 9)

= 1/9

-7/3 : - 21/6

= - 7/3 x - 6/21

= 42/63

= (21 x 2) / (21 x 3)

= 2/3.

Réponse :

Explications étape par étape

Bonjour

Calculer :

1 - 7/3

= 3/3 - 7/3

= (-4/3)

-2/10 + 7/25

= (-2 x 5)/(10 x 5) + (7 x 2)/(25 x 2)

= -10/50 + 14/50

= 4/50

= (2 x 2)/(2 x 25)

= 2/25

-7/15 x (-5/21)

= 7/21 x 5/15

= 1/3 x 1/3

= 1/9

-7/3 : (-21/6)

= 7/3 x 6/21

= 7/21 x 6/3

= 1/3 x 2

= 2/3