Name:____________________

Example 1) :   1 hr 20 min = ___ min

1 hr 20 min = 60 min + 20 min = 80 min

Example 2)    4600 sec = _____ hr _____ min _____ sec

Find how many hours there are in 4600 seconds:
4600: 3600 = 1 Remainder (1000) ; hence 4600 sec= 1hr 1000 sec
Find how many minutes there are in the remainder:
1000 : 60 = 16 remainder (40); hence 1000 sec = 16 min 40 sec.
4600 sec = 1 hr 16 min 40 sec

Solve:

1.   1 hr 15 min = _______ min

2.   90 min = _____ hr _____min

3.   1 min 25 sec = ________ sec

4.   2hr 45min 35 sec = _________sec

5.   1hr 35min 15 sec = __________ sec

6.    2hr 45 min = _________min

7.    106 min = ______hr _____min

8.    1hr 130 sec = ____hr _____min _____sec

9.    1200 sec = ____hr ____min ____sec

10.    5344 sec = ____hr ____min ____sec

11.    4000 sec = ____hr ____min ____ sec

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