Elapsed Time (Intro) — Answer Key
Part A: Multiple Choice
Circle the best answer for each question.
1. A movie starts at 2:30 and lasts 1 hour. What time does it end?
A) 3:00
B) 3:30
C) 4:00
D) 2:00
One whole hour after 2:30 is 3:30, so the movie ends at 3:30.
2. Story time begins at 10:00 and lasts 30 minutes. What time does it end?
A) 10:30
B) 11:00
C) 10:15
D) 9:30
30 minutes after 10:00 is 10:30, so story time ends at 10:30.
3. A snack break starts at 3:15 and lasts 15 minutes. What time does it end?
A) 3:45
B) 4:15
C) 3:30
D) 3:00
15 minutes after 3:15 is 3:30, so the snack break ends at 3:30.
4. Gym class starts at 1:00 and lasts 1 hour 30 minutes. What time does it end?
A) 2:00
B) 2:30
C) 3:00
D) 1:30
1 hour after 1:00 is 2:00, then 30 more minutes brings us to 2:30.
Part B: Fill in the Blank
Write the correct answer on each line.
1. A book club starts at 4:00 and lasts 1 hour. It ends at 5:00.
One hour after 4:00 is 5:00, so the book club ends at 5:00.
2. Art starts at 9:30 and lasts 30 minutes. It ends at 10:00.
30 minutes after 9:30 is 10:00, so art ends right at 10:00.
3. A puzzle time starts at 11:00 and lasts 45 minutes. It ends at 11:45.
45 minutes after 11:00 is 11:45, since 11:00 + 15 + 15 + 15 = 11:45.
4. Bath time starts at 7:15 and lasts 15 minutes. It ends at 7:30.
15 minutes after 7:15 is 7:30, since one quarter-hour hop moves from :15 to :30.
5. A hike starts at 8:00 and lasts 2 hours. It ends at 10:00.
Two whole-hour hops from 8:00 go 8 to 9 to 10, so the hike ends at 10:00.