cm

1. Calcul mental
n°27
“Des proportions ”

2. Calculer lesCalculer les
trois quartstrois quarts
de 100.de 100.
Diapositive 1Diapositive 1

4. CalculerCalculer
5% de 60.5% de 60.
Diapositive 2Diapositive 2

6. Compléter :Compléter :
Diapositive 3Diapositive 3
=
7
...%
25

8. Compléter :Compléter :
Diapositive 4Diapositive 4
=
3 15
7 ...

10. Compléter :Compléter :
Diapositive 5Diapositive 5
=
12 ...
4 7

12. FIN

13. CORRECTION

14. Diapositive 1Diapositive 1
× = × =
3
100 3 25
4
75

15. Diapositive 2Diapositive 2
× = × = =
5 300
5% 60 60
100 100
3

16. Diapositive 3Diapositive 3
×
=
×
= =
7 7 4
25 25 4
28
100
28%

17. Diapositive 4Diapositive 4
=
3 15
7 35

18. Diapositive 5Diapositive 5
= =
12
3
4
21
7