Elapsed Time (Intro) — Answer Key
Part A: Multiple Choice
Circle the best answer for each question.
1. Mia wakes at 7:00, eats breakfast for 20 minutes, then brushes for 10 minutes. What time is she done?
A) 7:20
B) 7:30
C) 7:40
D) 8:00
20 plus 10 is 30 minutes; 7:00 plus 30 minutes is 7:30.
2. Reading starts at 9:15 and lasts 30 minutes. Math starts right after and lasts 45 minutes. When does math end?
A) 9:45
B) 10:15
C) 10:30
D) 10:45
9:15 plus 30 is 9:45; 9:45 plus 45 is 10:30.
3. Recess is 10:30 to 10:50. Then art for 40 minutes. What time does art end?
A) 11:10
B) 11:20
C) 11:30
D) 11:40
10:50 plus 40 minutes is 11:30.
4. Leo starts homework at 4:00 for 25 minutes, rests 15 minutes, then plays 20 minutes. When is play done?
A) 4:40
B) 4:50
C) 5:00
D) 5:15
25 plus 15 plus 20 is 60 minutes; 4:00 plus 1 hour is 5:00.
Part B: Fill in the Blank
Write the correct answer on each line.
1. If school starts at 8:30 and lunch is at 12:00, the morning lasts 3 hours and 30 minutes.
8:30 to 11:30 is 3 hours; 11:30 to 12:00 adds the 30 minutes.
2. Story time is 9:00 to 9:20. It lasts 20 minutes.
From 9:00 to 9:20 is exactly 20 minutes.
3. Snack begins at 10:15 and lasts 15 minutes. It ends at 10:30.
10:15 plus 15 minutes is 10:30.
4. Gym is 1:00 to 1:45. It lasts 45 minutes.
From 1:00 to 1:45 is 45 minutes on the clock.
5. Music ends at 2:30. It started at 2:00. It lasted 30 minutes.
2:00 to 2:30 is a 30-minute block.