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Sagot :

Explications étape par étape:

1) 5 + 3 x (-5)

5 + (-15)

5-15

-10

2) 8- (-15+10)x2

8- (-5) x2

8+5 x2

18

3)-2 x8-4x(-10):2

-16 + 20

4

4)-8+2 x (-5) +9

-8-10+9

-9

5) //

-2 x (-7)

14

6) //

-5-10 : (3+2)

-5-10 :5

-5-2

-7

7) //

4 x (-15+12)

4x(-3)

-12

8)

1+2- 2x2

1+2-4

-1

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