Time Flashcards

All 5 cards in this deck

How many seconds are in a minute, minutes in an hour and hours in a day?

60 seconds = 1 minute, 60 minutes = 1 hour, 24 hours = 1 day.

How do you write a pm time using the 24-hour clock?

e.g. 6.45 pm

Add 12 to the hours: 18 45.
(12 noon stays 12 00; 12.30 am is 00 30.)

What are the steps to write a number of minutes as hours and minutes?

e.g. 140 minutes

1. Divide by 60 for the whole hours: $140 \div 60 = 2$ remainder 20
2. The remainder is the minutes: 20
3. Answer: 2 hours 20 minutes

True or false? 1 hour 18 minutes written as a decimal number of hours is 1.18 hours.

False.
It is 1.3 hours, because $18 \div 60 = 0.3$.

What are the steps to find how long it is between two clock times?

e.g. from 07:22 to 09:00

1. Count on to the next whole hour: 07:22 to 08:00 is 38 minutes
2. Count on the whole hours: 08:00 to 09:00 is 1 hour
3. Add them: 1 hour 38 minutes (= 98 minutes)