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Calcul mental
n°27
“Des proportions ”
Calculer lesCalculer les
trois quartstrois quarts
de 100.de 100.
Diapositive 1Diapositive 1
CalculerCalculer
5% de 60.5% de 60.
Diapositive 2Diapositive 2
Compléter :Compléter :
Diapositive 3Diapositive 3
=
7
...%
25
Compléter :Compléter :
Diapositive 4Diapositive 4
=
3 15
7 ...
Compléter :Compléter :
Diapositive 5Diapositive 5
=
12 ...
4 7
FIN
CORRECTION
Diapositive 1Diapositive 1
× = × =
3
100 3 25
4
75
Diapositive 2Diapositive 2
× = × = =
5 300
5% 60 60
100 100
3
Diapositive 3Diapositive 3
×
=
×
= =
7 7 4
25 25 4
28
100
28%
Diapositive 4Diapositive 4
=
3 15
7 35
Diapositive 5Diapositive 5
= =
12
3
4
21
7
4-Cm27 14-15
4-Cm27 14-15
4-Cm27 14-15
4-Cm27 14-15
4-Cm27 14-15
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4-Cm27 14-15

  1. 1. Calcul mental n°27 “Des proportions ”
  2. 2. Calculer lesCalculer les trois quartstrois quarts de 100.de 100. Diapositive 1Diapositive 1
  3. 3. CalculerCalculer 5% de 60.5% de 60. Diapositive 2Diapositive 2
  4. 4. Compléter :Compléter : Diapositive 3Diapositive 3 = 7 ...% 25
  5. 5. Compléter :Compléter : Diapositive 4Diapositive 4 = 3 15 7 ...
  6. 6. Compléter :Compléter : Diapositive 5Diapositive 5 = 12 ... 4 7
  7. 7. FIN
  8. 8. CORRECTION
  9. 9. Diapositive 1Diapositive 1 × = × = 3 100 3 25 4 75
  10. 10. Diapositive 2Diapositive 2 × = × = = 5 300 5% 60 60 100 100 3
  11. 11. Diapositive 3Diapositive 3 × = × = = 7 7 4 25 25 4 28 100 28%
  12. 12. Diapositive 4Diapositive 4 = 3 15 7 35
  13. 13. Diapositive 5Diapositive 5 = = 12 3 4 21 7

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