Réponse :

Explications étape par étape

Bonjour,

La prochaine fois, ne t'y prends pas à la dernière minute pour faire tes exercices...

24 / ... = -8

... = 24/-8 = -3

24 / (-3) = -8

-24 / ... = -12

... = -24/-12 = 2

-24 / 2 = -12

-18 / ... = -6

... = -18/-6

... = 3

-18 / 3 = -6

25 / ... = -5

... = 25/-5 = -5

25 / -5 = -5

-42 / ... = 6

... = -42/6 = -7

-42 / -7 = 6

-16 / ... = 32

... = -16/32 = -1/2

-16 / (-1/2) = 32

... / 2.5 = -100

... = -100 x 2.5 = -250

-250 / 2.5 = 100

... / 2.5 = -5

... = -5 x 2.5 = -12.5

-12.5 / 2.5 = -5

... / 5 = 100

... = 100 x 5 = 500

500 / 5 = 100

... / (-1) = 100

... = 100 x (-1) = -100

-100 / (-1) = 100

... / (-20) = -80

... = -80 x -20 = 1600

1600 / (-20) = -80

... / (-7) = 35

... = 35 x (-7) = -245

-245 / (-7) = 35

Exercice 7 :

A = 3.5 / (-4 x 8 + 25)

A = 3.5 / (-32 + 25)

A = 3.5 / (-7)

A = -1/2

B = (8 - 10) x (-3) + 3

B = (-2) x (-3) + 3

B = 6 + 3

B = 9