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Sagot :

Réponse :

Explications étape par étape

exo 1 a)( -3 )+ (-2) = -5

b) (-3) x (-2) = 6

c) (-2) x (-2) = +4

d) (-2) + (-2) = -4

exo2

1) a - bc = a - b x c (multiplication prioritaire)

= - 3 - 2 x (-1) = (-3) - (-2) = -1

2) a + b : c (division prioritaire)

-7 + 9 : (-3) = -7 + (-3)= -10

exo 3

A = (-4) x 0,278 x (- 2) x 5 x (- 2,5)

A = -1,112 x (-2) x 5 x (-2,5)

A= 2,224 x 5 x (-2,5)

A = 11,12 x (-2,5)

A = -27,8

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