Réponse :

bonjour

1. 5 + ( - 15) = 5 - 15 = - 10

2. 8 - ( - 15 + 10 ) x 2 = 8 - ( - 5 ) x 2 = 8 + 10 = 18

3. - 2 x 8 - 4 x ( -10) + 2 = - 16 + 40 + 2 = 26

4. - 8 + 2 x ( - 5 ) + 9 = - 8 - 10 + 9 = - 9

5 . ( 7 - 9) x ( - 4 - 3) = - 2 x - 7 = 14

6. - 5 - 10 +[( 3 - ( -2)] = - 5 - 10 + 3 + 2 = - 10

7. 4 x [ - 15 - 3 x ( -4 ) ] = 4 x ( - 15 + 12 ) = 4 x - 3 = - 12

8. 1 + 2 - ( - 3 + 5 ) x 2 = 1 + 2 - 2 x 2 = 1 + 2 - 4 = - 1

Explications étape par étape :