Calcule les expressions suivantes. A = 3 – 4 × (5 – 2) B = 3 × 4 – 2 × (4 – 1) C = 5 – 2 × 3 + 2 × 7 D = – 3 + (1 – 5) × (– 6) E = 1 – 2 × 3 + 4 × (– 5) F

A = 3 - 4 x (5 - 2) = 3 - 4 x 3 = 3 - 12 = -9

B = 3 x 4 - 2 x (4 - 1) = 12 - 2 x 3 = 12 - 6 = 6

C = 5 - 2 x 3 + 2 x 7 = 5 - 6 + 14 = 13

D = -3 + (1 - 5) x (-6) = -3 + (-4) x (-6) = -3 + 24 = 21

E = 1 - 2 x 3 + 4 x (-5) = 1 - 6 -20 = - 25

F = 1 + (-2)² - (-3)² = 1 + 4 - 9 = - 4

A= 3-4×(5-2). B=3×4-2×(4-1)

= 3-4×3. =3×4-2×3

= 3-12. =12-6

=9. =6

C=5-2×3+2×7. Et puis essaie de

=5-6+13. Faire la suite

=5-19

=14