Pour les exercices 17 à 24, calculer en respectant
les priorités.
17 a. 15+ (-6) × 2
c. - 9+ 6x (-5)
e. 4x (-5)+(-3) × (-2)
b. 13 + 4 × (-5)
d. 7-8 × (-3)
f. -3x (-1)-5x (-4)
b. 12 + 18:(-2)
18 a.-13 +15:5
c. 4-35:5 d. 7 - 20:(-5)
e. 12: (-4)-7x9
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