1. Calcul mental
“Racines carrées”
série n°3

2. Pour les 4 diapositives
suivantes calculer et écrire
le résultat sous la forme
d’un nombre entier.

3. Diapositive 1
10 × 10

4. Diapositive 2
2 2
3 +4

5. Diapositive 3
18
2

6. Diapositive 4
( )
2
2 3

7. Diapositive 5
Ecrire sous la forme a b
20

8. FIN

9. CORRECTION

10. Diapositive 1
10 × 10 = 10

11. Diapositive 1
10 × 10 = 10

12. Diapositive 2
2 2
3 + 4 = 9 + 16
= 25
=5

13. Diapositive 2
2 2
3 + 4 = 9 + 16
= 25
=5

14. Diapositive 2
2 2
3 + 4 = 9 + 16
= 25
=5

15. Diapositive 2
2 2
3 + 4 = 9 + 16
= 25
=5

16. Diapositive 3
18 18
=
2 2
= 9
=3

17. Diapositive 3
18 18
=
2 2
= 9
=3

18. Diapositive 3
18 18
=
2 2
= 9
=3

19. Diapositive 3
18 18
=
2 2
= 9
=3

20. Diapositive 4
( )
2
2 3 = 4 × 3 = 12

21. Diapositive 4
( )
2
2 3 = 4 × 3 = 12

22. Diapositive 4
( )
2
2 3 = 4 × 3 = 12

23. Diapositive 5
20 = 4 × 5
= 4× 5
=2 5

24. Diapositive 5
20 = 4 × 5
= 4× 5
=2 5

25. Diapositive 5
20 = 4 × 5
= 4× 5
=2 5

26. Diapositive 5
20 = 4 × 5
= 4× 5
=2 5