This document contains a series of word problems asking the reader to calculate fractions of durations of time. For each problem, it provides the number to divide the duration by and the full duration, then shows the step-by-step work and solution to find the fraction of the duration. It demonstrates calculating fractions of minutes, seconds, hours to show how to solve these types of time calculation word problems.

1. Calcul mental
N°24
“Fraction de durée”

2. Diapositive 1Diapositive 1
Calculer le temps.
5
de 16min
8

4. Diapositive 2Diapositive 2
Calculer le temps.
3
de 21s
7

6. Diapositive 3Diapositive 3
Calculer le temps.
2
de 1h
3

8. Diapositive 4Diapositive 4
Calculer le temps.
3
de 28min
4

10. Diapositive 5Diapositive 5
Calculer le temps.
4
de 15h
5

11. FIN

12. CORRECTION

13. Diapositive 1Diapositive 1
( )
= ×
= ÷ ×
= × =
5 5
de 16min 16min
8 8
16min 8 5
2min 5 10min

14. Diapositive 2Diapositive 2
( )
= ×
= ÷ ×
= × =
3 3
de 21s 21s
7 7
21s 7 3
3s 3 9s

15. Diapositive 3Diapositive 3
( )
= ×
= ÷ ×
= × =
2 2
de 1h 1h
3 3
60min 3 2
20min 2 40min

16. Diapositive 4Diapositive 4
( )
= ×
= ÷ ×
= × =
3 3
de 28min 28min
4 4
28min 4 3
7min 3 21min

17. Diapositive 5Diapositive 5
( )
= ×
= ÷ ×
= × =
4 4
de 15h 15h
5 5
15h 5 4
3h 4 12h