Elapsed Time (Intro) — Answer Key
Part A: Sort the Words
Sort each word or number into the correct category box.
1. Sort each activity time as AM (morning) or PM (afternoon/evening).
AM
story time 9:00bus stop 8:00reading 11:00 PM
dinner at 6:00TV show 7:00nap 2:00 Story time, the bus stop, and 11:00 reading are morning events (AM). Dinner, TV at 7:00, and a 2:00 nap are after noon (PM).
Part B: Fill in the Blank
Write the missing word or number on each line.
1. From 2:00 to 4:00 is 2 hours.
Hop forward one hour at a time from 2:00, and it takes 2 hops to reach 4:00.
2. From 9:00 to 10:00 is 1 hour.
Moving from 9:00 to 10:00 is a single one-hour jump, so the elapsed time is 1 hour.
3. From 1:00 to 5:00 is 4 hours.
Four whole-hour hops from 1:00 (to 2, 3, 4, 5) land on 5:00, so elapsed time is 4 hours.
4. Art class from 10:00 to 11:00 lasts 1 hour.
From 10:00 to 11:00 is one whole hour, so the class is 1 hour long.
5. From 3:00 to 6:00 is 3 hours.
Count whole hours 3 to 4, 4 to 5, 5 to 6. That is 3 one-hour hops.
Part C: True or False?
Read each statement. Circle True or False.
1. From 4:00 to 5:00 is 1 hour.
True False
Moving from 4:00 to 5:00 is a single hour, so the elapsed time is exactly 1 hour.
2. From 2:00 to 4:00 is 3 hours.
True False
There are only 2 whole-hour hops between 2:00 and 4:00, not 3.
3. From 7:00 to 10:00 is 3 hours.
True False
Three whole-hour hops (7 to 8, 8 to 9, 9 to 10) make the elapsed time 3 hours.
4. From 6:00 to 6:00 is 1 hour.
True False
If start and end are the same time, no time has passed, so elapsed time is 0 hours.