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4-Cm18 14-15

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4-Cm18 14-15

  1. 1. Calcul mental N°18 “Différentes écritures d’une fraction et calculs”
  2. 2. Donner une écritureDonner une écriture fractionnaire de :fractionnaire de : Diapositive 1Diapositive 1 0,5
  3. 3. Compléter :Compléter : Diapositive 2Diapositive 2 ... 50% 24 =
  4. 4. Compléter :Compléter : Diapositive 4Diapositive 4 = 90 10 27 ...
  5. 5. Diapositive 4Diapositive 4 Calculer:Calculer: − 4 5 3 3
  6. 6. Calculer :Calculer : Diapositive 5Diapositive 5 − + 5 1 3 4
  7. 7. FIN
  8. 8. CORRECTION
  9. 9. Diapositive 1Diapositive 1 = = 50 1 1 0 00 ,5 2
  10. 10. Diapositive 2Diapositive 2 = = 50 50% 100 12 24
  11. 11. Diapositive 3Diapositive 3 = 90 10 27 3
  12. 12. Diapositive 4Diapositive 4 − − = − = 4 5 4 5 3 3 3 1 3
  13. 13. Diapositive 5Diapositive 5 ×− − + = + − = + − × × = × = 5 1 5 1 3 4 3 4 20 3 12 12 20 3 12 4 3 3 4 17 12

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