cm

1. Calcul mental
N°12
“Le code des opérations”

2. 30 + 64 + 70
Diapositive 1Diapositive 1

4. 987 + 9 + 91
Diapositive 2Diapositive 2

6. 2,5 × 59 × 4
Diapositive 3Diapositive 3

8. 50 - 2 × 5
Diapositive 4Diapositive 4

10. 7 + 5 × 4
Diapositive 5Diapositive 5

12. FIN

13. CORRECTION

14. 30 + 64 + 70
= 100 + 64
= 164
Diapositive 1Diapositive 1

15. 987 + 9 + 91
= 987 +100
= 1087
Diapositive 2Diapositive 2

16. 2,5 × 59 × 4
= 59 × 10
= 590
Diapositive 3Diapositive 3

17. 50 - 2 × 5
= 50 – 10 = 40
Diapositive 4Diapositive 4

18. 7 + 5 × 4
= 7 + 20 = 27
Diapositive 5Diapositive 5