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4-Cm24 14-15

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4-Cm24 14-15

  1. 1. Calcul mental N°24 “Des opérations avec des fractions”
  2. 2. Diapositive 1Diapositive 1 Calculer:Calculer: + − 4 ( 2) 5
  3. 3. Diapositive 2Diapositive 2 Calculer :Calculer : − 1 2 4 5
  4. 4. Diapositive 3Diapositive 3 Calculer :Calculer : × -11 5 2 3
  5. 5. Diapositive 4Diapositive 4 Donner l’inverse de :Donner l’inverse de : 9
  6. 6. Diapositive 5Diapositive 5 Calculer :Calculer : −10 7 : 3 2
  7. 7. FIN
  8. 8. CORRECTION
  9. 9. Diapositive 1Diapositive 1 − × + − = + − = + − = 4 4 ( 2) 5 ( 2) 5 5 5 4 10 5 5 6 5
  10. 10. Diapositive 2Diapositive 2 − = = − = × × − × × 1 2 1 2 4 5 4 5 5 8 20 2 5 4 4 0 5 -3 20
  11. 11. Diapositive 3Diapositive 3 × × = − = − × -11 5 11 5 2 3 2 3 55 6
  12. 12. Diapositive 4Diapositive 4 L’inverse de est Car 1 9 × =9 1 9 1 9
  13. 13. Diapositive 5Diapositive 5 − = − −× = 10 7 10 2 : 3 2 3 7 20 21

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