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Negative elapsed time from analog clock

Negative elapsed time from a clock and a number of minutes

The math skill taught here involves subtracting a specified number of minutes from a given time, demonstrating how to backtrack past the hour mark if necessary and finding the resulting time.

Learn negative elapsed time from analog clock

Teaching Transcript

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What is the time after 30 minutes are subtracted?

First let's read the time. The hour hand is just past 2, and the minute hand is at 3, so it's two fifteen

Now we can subtract 30 minutes. Remember that there are 60 minutes in an hour, so we subtract 15 to get to zero, and then 60 minus 15 is 45. So our time is one 45.

We can show as a clock if we need to by putting the hour hand between 1 and 2, and the minute hand to 9, which means 45 minutes

Skill Practice

Negative elapsed time from a clock and a number of minutes

Test your understanding of negative elapsed time from analog clock by practicing it! Work through the below exercises to use it in practice.