Sure! Let’s solve each problem step by step and explain the reasoning clearly.
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Problem 1:
> School starts at 9 o’clock in the morning and ends after 6 hours. What time does school end?
✔ Solution:
Start time: 9:00 AM
Add 6 hours → 9 + 6 = 15 (in 24-hour time) → which is 3:00 PM
Answer: School ends at 3 o’clock in the afternoon.
📌 *Explanation:* We simply add the number of hours to the starting time. Since 9 AM + 6 hours = 3 PM, that’s when school ends.
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Problem 2:
> The second recess is at 1 o’clock in the afternoon, which is 2 hours after the first recess. When is the first recess?
✔ Solution:
Second recess = 1:00 PM
It’s 2 hours AFTER the first recess → so subtract 2 hours from 1:00 PM.
1:00 PM – 2 hours = 11:00 AM
Answer: The first recess is at 11 o’clock in the morning.
📌 *Explanation:* If the second recess comes 2 hours after the first, then the first recess must be 2 hours earlier than 1 PM — which is 11 AM.
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Problem 3:
> The principal started a meeting on Monday at 10 o’clock in the morning. The meeting ended at 1 o’clock in the afternoon. How long was the meeting?
✔ Solution:
Start time: 10:00 AM
End time: 1:00 PM
From 10 AM to 1 PM is 3 hours.
Answer: The meeting lasted 3 hours.
📌 *Explanation:* Count the hours:
- 10 AM to 11 AM = 1 hour
- 11 AM to 12 PM = 1 hour
- 12 PM to 1 PM = 1 hour
Total = 3 hours
You can also think: 1 PM is 13:00 in 24-hour time → 13 – 10 = 3 hours.
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✔ Final Answers:
1. School ends at
3 o’clock in the afternoon.
2. The first recess is at
11 o’clock in the morning.
3. The meeting lasted
3 hours.
Let me know if you’d like to visualize these with clocks or number lines!
Parent Tip: Review the logic above to help your child master the concept of first grade problem solving worksheet.
