6-cm18 14-15
TRANSCRIPT
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Calcul mentalN°18
“Fraction de durée”
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Diapositive 1Diapositive 1
Calculer le temps.
5 de 16min8
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Diapositive 2Diapositive 2
Calculer le temps.
3 de 21s7
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Diapositive 3Diapositive 3
Calculer le temps.
2 de 1h3
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Diapositive 4Diapositive 4
Calculer le temps.
3 de 28min4
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Diapositive 5Diapositive 5
Calculer le temps.
4 de 15h5
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FIN
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CORRECTION
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Diapositive 1Diapositive 1
( )
= ×
= ÷ ×
= × =
5 5 de 16min 16min8 8
16min 8 52min 5 10min
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Diapositive 2Diapositive 2
( )= ×
= ÷ ×
= × =
3 3 de 21s 21s7 7
21s 7 33s 3 9s
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Diapositive 3Diapositive 3
( )
= ×
= ÷ ×
= × =
2 2 de 1h 1h3 3
60min 3 220min 2 40min
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Diapositive 4Diapositive 4
( )= ×
= ÷ ×
= × =
3 3 de 28min 28min4 4
28min 4 37min 3 21min
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Diapositive 5Diapositive 5
( )
= ×
= ÷ ×
= × =
4 4 de 15h 15h5 5
15h 5 43h 4 12h