Let's solve each problem step by step.
---
Problem 1:
Your mother went to the kitchen at 11 o'clock. She cooked for 1 hour. At what time did she finish cooking?
-
Start time: 11:00
-
Duration of cooking: 1 hour
To find the end time, we add the duration to the start time:
\[
11:00 + 1 \text{ hour} = 12:00
\]
Answer: She finished cooking at
12:00.
---
Problem 2:
Megan left for her morning walk at 5 o'clock. She came back at 7 o'clock. How long was she away?
-
Start time: 5:00
-
End time: 7:00
To find the duration, we subtract the start time from the end time:
\[
7:00 - 5:00 = 2 \text{ hours}
\]
Answer: Megan was away for
2 hours.
---
Problem 3:
A baseball game started at 10 o'clock. It ended at 1 o'clock. How long was the game?
-
Start time: 10:00
-
End time: 1:00 (next day)
Since the game ended at 1:00 the next day, we need to calculate the elapsed time across midnight:
1. From 10:00 to 12:00 (midnight): 2 hours
2. From 12:00 to 1:00: 1 hour
Adding these together:
\[
2 \text{ hours} + 1 \text{ hour} = 3 \text{ hours}
\]
Answer: The game lasted
3 hours.
---
Problem 4:
Jenifer spent 1 hour working on a science project. If she started at 4 o'clock, at what time did she finish?
-
Start time: 4:00
-
Duration of work: 1 hour
To find the end time, we add the duration to the start time:
\[
4:00 + 1 \text{ hour} = 5:00
\]
Answer: Jenifer finished at
5:00.
---
Final Answers:
1.
12:00
2.
2 hours
3.
3 hours
4.
5:00
\boxed{12:00, 2 \text{ hours}, 3 \text{ hours}, 5:00}
Parent Tip: Review the logic above to help your child master the concept of elapsed time word problems worksheet 3rd grade.
