Elapsed Time — Answer Key
Part A: Multiple Choice
Circle the best answer for each question.
1. In Grade 3, a trip left at 10:45 AM and arrived at 1:20 PM. How long?
A) 2 h 35 min
B) 2 h 25 min
C) 3 h 35 min
D) 1 h 35 min
10:45 AM to 12:00 is 1 h 15 min, plus 1 h 20 min = 2 h 35 min.
2. In Grade 3, a bus left at 11:50 PM and arrived at 1:15 AM. Duration?
A) 1 h 25 min
B) 2 h 25 min
C) 1 h 15 min
D) 1 h 35 min
11:50 PM to 12:00 AM is 10 min, plus 1 h 15 min = 1 h 25 min.
3. In Grade 3, a hike started 9:20 AM and took 3 h 40 min. End time?
A) 1:00 PM
B) 12:40 PM
C) 1:20 PM
D) 12:00 PM
9:20 plus 3 h is 12:20 PM, plus 40 min equals 1:00 PM.
4. In Grade 3, a flight from 10:30 PM landed at 2:05 AM. How long?
A) 3 h 35 min
B) 4 h 35 min
C) 3 h 25 min
D) 2 h 35 min
10:30 PM to 12:00 AM is 1 h 30 min, plus 2 h 5 min = 3 h 35 min.
Part B: Fill in the Blank
Write the correct answer on each line.
1. In Grade 3, 11:20 AM plus 2 h 50 min crosses noon and ends at 2:10 PM.
11:20 plus 2 h is 1:20 PM, plus 50 min equals 2:10 PM.
2. In Grade 3, a drive from 8:45 PM to 12:10 AM lasted 3 h 25 min.
8:45 PM to 12:00 AM is 3 h 15 min, plus 10 min = 3 h 25 min.
3. In Grade 3, noon to 3:25 PM is a duration of 3 h 25 min.
From 12:00 PM to 3:25 PM is 3 hours and 25 minutes.
4. In Grade 3, 11:55 PM plus 30 min ends at 12:25 AM.
11:55 PM plus 5 min is 12:00 AM, plus 25 min equals 12:25.
5. In Grade 3, 9:10 AM to 12:40 PM lasts 3 h 30 min.
9:10 AM to 12:00 PM is 2 h 50 min, plus 40 min = 3 h 30 min.