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# 4-Cm17 11-12

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### 4-Cm17 11-12

1. 1. Calcul mental “Différentes écritures d’une fraction et calculs” Série n°2
2. 2. Diapositive 1 Donner l’écriture décimale de 18 4
3. 3. Diapositive 2 Donner une écriture fractionnaire de : 0, 25
4. 4. Diapositive 3 Compléter : 3 21 = 4 ...
5. 5. Diapositive 4 Calculer: 2 7 − 3 3
6. 6. Diapositive 5 Calculer : 3 1 + 5 4
7. 7. FIN
8. 8. CORRECTION
9. 9. Diapositive 1 18 = 18 ÷ 4 = 4,5 4
10. 10. 25 1 0, 25 = = 100 4 Diapositive 2
11. 11. Diapositive 3 3 21 = 4 28
12. 12. Diapositive 4 2 7 2 − 7 −5 − = = 3 3 3 3
13. 13. Diapositive 5 3 1 3 × 4 1 ×5 + = + 5 4 5 × 4 4 ×5 12 5 = + 20 20 12 + 5 17 = = 20 20