1. Calcul mental
“Racines carrées”
série n°4

2. Pour les 3 premières
diapositives, écrire sous
une forme aussi simple
que possible.

3. Diapositive 1
( )
2
7

4. Diapositive 2
16 + 9

5. Diapositive 3
2× 6
3

6. Diapositive 4
Ecrire sous la forme a b
3 2 −7 2 + 2

7. Diapositive 5
Ecrire sous la forme a b
18

8. FIN

9. CORRECTION

10. Diapositive 1
( )
2
7 =7

11. Diapositive 1
( )
2
7 =7

12. Diapositive 2
16 + 9 = 4 + 3 = 7

13. Diapositive 2
16 + 9 = 4 + 3 = 7

14. Diapositive 2
16 + 9 = 4 + 3 = 7

15. Diapositive 3
2× 6 12 12
= = = 4 =2
3 3 3

16. Diapositive 3
2× 6 12 12
= = = 4 =2
3 3 3

17. Diapositive 3
2× 6 12 12
= = = 4 =2
3 3 3

18. Diapositive 3
2× 6 12 12
= = = 4 =2
3 3 3

19. Diapositive 3
2× 6 12 12
= = = 4 =2
3 3 3

20. Diapositive 4
3 2 − 7 2 + 2 = ( 3 − 7 + 1) 2 = -3 2

21. Diapositive 4
3 2 − 7 2 +1 2 = ( 3 − 7 + 1) 2 = -3 2

22. Diapositive 4
3 2 − 7 2 +1 2 = ( 3 − 7 + 1) 2 = -3 2

23. Diapositive 4
3 2 − 7 2 +1 2 = ( 3 − 7 + 1) 2 = -3 2

24. Diapositive 5
18 = 9 × 2
= 9× 2
=3 2

25. Diapositive 5
18 = 9 × 2
= 9× 2
=3 2

26. Diapositive 5
18 = 9 × 2
= 9× 2
=3 2

27. Diapositive 5
18 = 9 × 2
= 9× 2
=3 2