Elapsed Time (Intro) — Answer Key
Part A: Sort the Words
Sort each word or number into the correct category box.
1. Sort each duration by whether it is less than an hour or more than an hour.
Less than an hour
45 minutes30 minutes15 minutes More than an hour
2 hours90 minutes3 hours Understanding the 60-minute benchmark helps students estimate and compare time spans.
Part B: Fill in the Blank
Write the missing word or number on each line.
1. A duration of 45 minutes is less than one hour.
45 is smaller than 60, so the span is shorter than an hour.
2. Two hours is more than one hour.
Counting hours, 2 is greater than 1, so it is more than one hour.
3. Ninety minutes equals 1 hour and 30 minutes.
90 minus 60 leaves 30 minutes beyond the full hour.
4. Half an hour is the same as 30 minutes.
One hour splits into two halves of 30 minutes each.
5. Three hours is 180 minutes in total.
60 plus 60 plus 60 makes 180 minutes in three hours.
Part C: True or False?
Read each statement. Circle True or False.
1. A duration of 50 minutes is less than one hour.
True False
50 minutes is 10 short of a full hour, so it is less.
2. Two hours is less than one hour.
True False
Two hours is double one hour, so it is more, not less.
3. Seventy-five minutes is more than one hour.
True False
75 minutes passes the 60-minute mark by 15 minutes.
4. Twenty minutes is more than one hour.
True False
20 is smaller than 60, so this span is less than an hour.