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