2. ACTIVITES MENTALES Collège Jean Monnet Préparez-vous !

3. Calculer : (-5) - (-6) + (-3) + (+1) Question 1

4. Question 2 Calculer 30 1,5

5. Question 3 Calculer 4949 1313 +

6. Question 4 BCx = 125° ? Quelle est la mesure de BAC, sachant que ? x CB A

7. Calculer : Question 5 1313 2525 x

8. Correction

9. Calculer : Question 1 -1 (-5) - (-6) + (-3) + (+1) = (-8) + (+7) = = (-5) + (+6) + (-3) + (+1)

10. Question 2 Calculer 30 1,5 30 1,5 = 300 15 = 100 5 = 20

11. Question 3 Calculer 4949 1313 + = 7979 4949 3939 + =

12. Question 4 mesure de BAC ? BCA = 125° - 90° ? x CB A 125° = 35° BAC = 90° - 35° = 55°

13. Calculer : Question 5 = 2 15 1313 2525 x

14. FIN !