Bonjour, je suis en 4ème, et j'ai un DM de maths à rendre demain. Pouvez-vous m'aider pour les exercices 4 et 6? Si possible le 5 aussi... Merci d'avance! Exercice 4. Complète :
)(-6) ×. . . . . . . . . . = 12 ). . . . . . . . . .× (-3) = -18 )(-12) ÷. . . . . . . . . . = 4
)10. . . . . . . . . . (-2) = -5 )18. . . . . . . . . . (-9) = 9 )(-8). . . . . . . . . . (-4) = -4

Exercice 5. Complète :
A = 6a-a+4a
A =

B = 9a – 4b + 8c – 3a + 5b – c
B =

C = – 5x + 3 – 4x – 1
C =

D = 5x3 – 2x2 – 3x + 7 – 2x + 6x3 – 4x2 + 3 + 5x2 – 6 + x3
D =

E = 4x + 6x + 4x × 6x
E =
E =

Exercice 6. Calcule :
= (-10) + (-2) × (-8) = 6 × (-2 - 8) = -7 + 3 × (4 - (-8 + 3 × 6) ÷ (-2))
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