bjr
1. A = 5– 4x(−3+2) on calcule dans les ( )
= 5 - 4 x (-1) puis on effectue la multiplication
= 5 + 4 et en dernier l'addition
= 9
2. B = 1 + (2–3 x (4-5))
= 1 + (2 - 3 x (-1))
= 1 + (2 +3)
= 1 + 5 = 6
3. C =5 - 4 x (−1 + 2 x 3)
= 5 - 4 x (-1 + 6)
= 5 - 4 x (5)
= 5 - 20
= -15
4. D = -(-5)x2+3(1-9)
= - (-10) + 3 x (-8)
= 10 - 24
= -14
5. E = 31x(-5)-(2 - 6 x (-1))
= 31 x (-5) - (2 + 6)=
= -155 - 8 = - 163