Calcul mental
N°18
“Fraction de durée”
Diapositive 1Diapositive 1
Calculer le temps.
5
de 16min
8
Diapositive 2Diapositive 2
Calculer le temps.
3
de 21s
7
Diapositive 3Diapositive 3
Calculer le temps.
2
de 1h
3
Diapositive 4Diapositive 4
Calculer le temps.
3
de 28min
4
Diapositive 5Diapositive 5
Calculer le temps.
4
de 15h
5
FIN
CORRECTION
Diapositive 1Diapositive 1
( )
= ×
= ÷ ×
= × =
5 5
de 16min 16min
8 8
16min 8 5
2min 5 10min
Diapositive 2Diapositive 2
( )
= ×
= ÷ ×
= × =
3 3
de 21s 21s
7 7
21s 7 3
3s 3 9s
Diapositive 3Diapositive 3
( )
= ×
= ÷ ×
= × =
2 2
de 1h 1h
3 3
60min 3 2
20min 2 40min
Diapositive 4Diapositive 4
( )
= ×
= ÷ ×
= × =
3 3
de 28min 28min
4 4
28min 4 3
7min 3 21min
Diapositive 5Diapositive 5
( )
= ×
= ÷ ×
= × =
4 4
de 15h 15h
5 5
15h 5 4
3h 4 12h
6-Cm18 14-15
6-Cm18 14-15
6-Cm18 14-15
6-Cm18 14-15
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6-Cm18 14-15

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6-Cm18 14-15

  1. 1. Calcul mental N°18 “Fraction de durée”
  2. 2. Diapositive 1Diapositive 1 Calculer le temps. 5 de 16min 8
  3. 3. Diapositive 2Diapositive 2 Calculer le temps. 3 de 21s 7
  4. 4. Diapositive 3Diapositive 3 Calculer le temps. 2 de 1h 3
  5. 5. Diapositive 4Diapositive 4 Calculer le temps. 3 de 28min 4
  6. 6. Diapositive 5Diapositive 5 Calculer le temps. 4 de 15h 5
  7. 7. FIN
  8. 8. CORRECTION
  9. 9. Diapositive 1Diapositive 1 ( ) = × = ÷ × = × = 5 5 de 16min 16min 8 8 16min 8 5 2min 5 10min
  10. 10. Diapositive 2Diapositive 2 ( ) = × = ÷ × = × = 3 3 de 21s 21s 7 7 21s 7 3 3s 3 9s
  11. 11. Diapositive 3Diapositive 3 ( ) = × = ÷ × = × = 2 2 de 1h 1h 3 3 60min 3 2 20min 2 40min
  12. 12. Diapositive 4Diapositive 4 ( ) = × = ÷ × = × = 3 3 de 28min 28min 4 4 28min 4 3 7min 3 21min
  13. 13. Diapositive 5Diapositive 5 ( ) = × = ÷ × = × = 4 4 de 15h 15h 5 5 15h 5 4 3h 4 12h

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