cm

1. Calcul mental
N°26
“Des proportions ”

2. Calculer lesCalculer les
trois quartstrois quarts
de 20.de 20.
Diapositive 1Diapositive 1

4. CalculerCalculer
5% de 40.5% de 40.
Diapositive 2Diapositive 2

6. Compléter :Compléter :
Diapositive 3Diapositive 3
=
3
...%
25

8. Compléter :Compléter :
Diapositive 4Diapositive 4
=
5 10
12 ...

10. Compléter :Compléter :
Diapositive 5Diapositive 5
=
20 ...
4 3

12. FIN

13. CORRECTION

14. Diapositive 1Diapositive 1
× = × =
3
20 3 5
4
15

15. Diapositive 2Diapositive 2
× = × = =
5 200
5% 40 40
100 100
2

16. Diapositive 3Diapositive 3
×
=
×
= =
3 3 4
25 25 4
12
100
12%

17. Diapositive 4Diapositive 4
=
5 10
12 24

18. Diapositive 5Diapositive 5
= =
20
5
4
15
3