Answer Keys: Time & Elapsed Time

Grade 3 Mathematics | FAST Success Kit

Teacher/Parent Resource: This page contains all answers. Keep separate from student materials.
Student Concept Worksheet Answers
1. Clocks
2:20, 7:09
2. a.m./p.m.
a.m., p.m., p.m.
3. Movie (2:00-3:45)
1 hour 45 minutes
4. Dance (4:30 + 1:15)
5:45 p.m.
Practice Worksheet Answers

Part A: Tell Time

1.
5:00
2.
8:25
3.
1:15
4.
9:45
5.
3:30
6.
6:11
7.
12:00
8.
7:21

Part B: A.M. or P.M.

9. Wake up 6:30
a.m.
10. Lunch 12:15
p.m.
11. Dinner 6:00
p.m.
12. Bed 8:45
p.m.
13. Recess 10:15
a.m.
14. Soccer 4:30
p.m.

Part C: Elapsed Time

15. 3:00-4:30
1 hr 30 min
16. 9:15-10:45
1 hr 30 min
17. 11:30a-2:00p
2 hr 30 min
18. 7:45-9:20
1 hr 35 min

Part D: Find End Time

19. 2:00+45min
2:45 p.m.
20. 10:30+1:30
12:00 p.m.
21. 5:45+2:15
8:00 p.m.

Part E: Word Problems

22. Library open
8 hours
23. Homework
45 minutes
24. Baseball game
4:15 p.m.
25. Wake up time
7:20 a.m.
FAST Practice Quiz Answers
1
B. 2:20
Hour hand near 2, minute hand on 4 (20 minutes).
2
A. a.m. because she wakes up in the morning
Morning times (before noon) are a.m.
3
B. 1 hour 45 minutes
7:15 to 8:15 = 1 hour, 8:15 to 9:00 = 45 minutes. Total: 1 hr 45 min.
4
6 hours 45 minutes
8:15 to 12:15 = 4 hours, 12:15 to 3:00 = 2 hr 45 min. Total: 6 hr 45 min.
5
B. 5:15 p.m.
4:30 + 45 min: 4:30 to 5:00 = 30 min, need 15 more = 5:15. Answer A (4:75) is impossible!
6
A. 9:47
Hour hand just before 10, minute hand pointing to ~47 minutes.
7
A. 2 hours 30 minutes
11:45 to 12:45 = 1 hr, 12:45 to 2:15 = 1 hr 30 min. Total: 2 hr 30 min.
8
4:45 p.m.
3:20 + 1 hr = 4:20, + 25 min = 4:45 p.m.
9
B. 6:30 p.m.
8:30 p.m. - 2 hours = 6:30 p.m. Still evening, so still p.m.
10
A. 4:25 p.m.
20 min + 15 min = 35 minutes total. 5:00 - 35 min = 4:25 p.m.

Scoring Guide

Assessment Total Points Proficient (70%+) Needs Support
Student Concept Worksheet 4 points 3+ correct Practice with analog clock
Practice Worksheet 25 points 18+ correct Use number lines for elapsed time
FAST Practice Quiz 10 points 7+ correct Focus on a.m./p.m. and crossing hours

Common Errors: Reading minute hand as hours (3 instead of 15), forgetting to change a.m./p.m. at noon, adding time like regular numbers (writing 4:75 instead of 5:15).

FAST Success Kit | Grade 3 | FL B.E.S.T. Standards: MA.3.M.2.1, MA.3.M.2.2