To solve the problem, we need to calculate the times based on the given conditions and then convert them to the 24-hour clock format. Let's go through each part step by step.
---
a) 2 hours after 6:30 am
- Start time: 6:30 am
- Add 2 hours: \( 6:30 + 2 \) hours = 8:30 am
- Convert to 24-hour format: 08:30
Answer: 08:30 Hr
---
b) 1 hour before 12:40 pm
- Start time: 12:40 pm
- Subtract 1 hour: \( 12:40 - 1 \) hour = 11:40 am
- Convert to 24-hour format: 11:40
Answer: 11:40 Hr
---
c) 3 hours 20 minutes before 2:10 am
- Start time: 2:10 am
- Subtract 3 hours 20 minutes:
- First, subtract 3 hours: \( 2:10 - 3 \) hours = 11:10 pm (previous day)
- Then, subtract 20 minutes: \( 11:10 - 20 \) minutes = 10:50 pm
- Convert to 24-hour format: 22:50
Answer: 22:50 Hr
---
d) 50 minutes after 11:15 pm
- Start time: 11:15 pm
- Add 50 minutes:
- First, add 50 minutes to 11:15: \( 11:15 + 50 \) minutes = 12:05 am (next day)
- Convert to 24-hour format: 00:05
Answer: 00:05 Hr
---
e) 5 hours after 7 am
- Start time: 7 am
- Add 5 hours: \( 7 + 5 \) hours = 12 noon
- Convert to 24-hour format: 12:00
Answer: 12:00 Hr
---
f) 1 hour 45 minutes before 9:55 pm
- Start time: 9:55 pm
- Subtract 1 hour 45 minutes:
- First, subtract 1 hour: \( 9:55 - 1 \) hour = 8:55 pm
- Then, subtract 45 minutes: \( 8:55 - 45 \) minutes = 8:10 pm
- Convert to 24-hour format: 20:10
Answer: 20:10 Hr
---
g) 55 minutes after 8:40 am
- Start time: 8:40 am
- Add 55 minutes:
- First, add 55 minutes to 8:40: \( 8:40 + 55 \) minutes = 9:35 am
- Convert to 24-hour format: 09:35
Answer: 09:35 Hr
---
h) 2 hours 35 minutes before quarter past 1 pm
- Quarter past 1 pm = 1:15 pm
- Subtract 2 hours 35 minutes:
- First, subtract 2 hours: \( 1:15 - 2 \) hours = 11:15 am
- Then, subtract 35 minutes: \( 11:15 - 35 \) minutes = 10:40 am
- Convert to 24-hour format: 10:40
Answer: 10:40 Hr
---
i) 30 minutes before 12:20 am
- Start time: 12:20 am
- Subtract 30 minutes: \( 12:20 - 30 \) minutes = 11:50 pm (previous day)
- Convert to 24-hour format: 23:50
Answer: 23:50 Hr
---
j) 2 hours after quarter to 10 pm
- Quarter to 10 pm = 9:45 pm
- Add 2 hours: \( 9:45 + 2 \) hours = 11:45 pm
- Convert to 24-hour format: 23:45
Answer: 23:45 Hr
---
Final Answers:
\[
\boxed{
\begin{array}{ll}
\text{a)} & 08:30 \, \text{Hr} \\
\text{b)} & 11:40 \, \text{Hr} \\
\text{c)} & 22:50 \, \text{Hr} \\
\text{d)} & 00:05 \, \text{Hr} \\
\text{e)} & 12:00 \, \text{Hr} \\
\text{f)} & 20:10 \, \text{Hr} \\
\text{g)} & 09:35 \, \text{Hr} \\
\text{h)} & 10:40 \, \text{Hr} \\
\text{i)} & 23:50 \, \text{Hr} \\
\text{j)} & 23:45 \, \text{Hr} \\
\end{array}
}
\]
Parent Tip: Review the logic above to help your child master the concept of time worksheet for grade 5.
