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You've shared an image containing exercises related to time unit conversions (hours to minutes, minutes to hours, minutes to seconds, and seconds to minutes). Let's go through some of these conversions step-by-step:

### Convert: \( \text{hours} \leftrightarrow \text{minutes} \)
1. **5 hours to minutes**: 
   \[
   5 \text{ hours} \times 60 \text{ minutes/hour} = 300 \text{ minutes}
   \]
2. **16 hours to minutes**: 
   \[
   16 \times 60 = 960 \text{ minutes}
   \]
3. **4.5 hours to minutes**:
   \[
   4.5 \times 60 = 270 \text{ minutes}
   \]
4. **0.68 hours to minutes**:
   \[
   0.68 \times 60 = 40.8 \text{ minutes}
   \]
5. **4 hours to minutes**:
   \[
   4 \times 60 = 240 \text{ minutes}
   \]

6. **15 minutes to hours**:
   \[
   \frac{15}{60} = 0.25 \text{ hours}
   \]
7. **40 minutes to hours**:
   \[
   \frac{40}{60} = 0.6667 \text{ hours} \approx 0.67 \text{ hours}
   \]
8. **96 minutes to hours**:
   \[
   \frac{96}{60} = 1.6 \text{ hours}
   \]
9. **360 minutes to hours**:
   \[
   \frac{360}{60} = 6 \text{ hours}
   \]
10. **0.87 minutes to hours**:
    \[
    \frac{0.87}{60} = 0.0145 \text{ hours} \approx 0.015 \text{ hours}
    \]

### Convert: \( \text{minutes} \leftrightarrow \text{seconds} \)
1. **10 minutes to seconds**:
   \[
   10 \times 60 = 600 \text{ seconds}
   \]
2. **45 minutes to seconds**:
   \[
   45 \times 60 = 2700 \text{ seconds}
   \]
3. **625 minutes to seconds**:
   \[
   625 \times 60 = 37500 \text{ seconds}
   \]
4. **7.80 minutes to seconds**:
   \[
   7.80 \times 60 = 468 \text{ seconds}
   \]
5. **0.65 minutes to seconds**:
   \[
   0.65 \times 60 = 39 \text{ seconds}
   \]

6. **20 seconds to minutes**:
   \[
   \frac{20}{60} = 0.3333 \text{ minutes} \approx 0.33 \text{ minutes}
   \]
7. **55 seconds to minutes**:
   \[
   \frac{55}{60} = 0.9167 \text{ minutes} \approx 0.92 \text{ minutes}
   \]
8. **186 seconds to minutes**:
   \[
   \frac{186}{60} = 3.1 \text{ minutes}
   \]
9. **64.4 seconds to minutes**:
   \[
   \frac{64.4}{60} = 1.0733 \text{ minutes} \approx 1.07 \text{ minutes}
   \]
10. **0.659 seconds to minutes**:
    \[
    \frac{0.659}{60} = 0.01098 \text{ minutes} \approx 0.011 \text{ minutes}
    \]

If you want more details or have any questions, feel free to ask!

Here are some related questions:
1. How do you convert hours to seconds directly?
2. What is the process to convert 0.5 hours to seconds?
3. How many hours are there in 5400 seconds?
4. Can you explain how to convert 0.75 minutes to seconds?
5. What is the formula to convert seconds to hours?

**Tip**: Always remember the key conversion factors for time:
- 1 hour = 60 minutes
- 1 minute = 60 seconds

The image contains exercises for converting units of time between hours, minutes, and seconds.

Practice time unit conversions with step-by-step exercises on converting hours to minutes, minutes to hours, minutes to seconds, and seconds to minutes. Suitable for students in Grades 5-7.

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