Let's go through the questions visible in the image and provide the correct answers with explanations:

1. What is a unit fraction?

The question asks about a unit fraction.

• Correct Answer: B (A fraction that has a numerator of 1)

Explanation: A unit fraction is a fraction where the numerator is 1, such as $\frac{1}{2}, \frac{1}{3}, \frac{1}{4}$, etc.

2. A meter stick is cut into smaller pieces. How many equal pieces are in the meter stick?

The question asks for the number of pieces.

• Correct Answer: B (4)

Explanation: If a meter stick (which is 100 cm) is divided into smaller pieces, and we assume each piece is 25 cm, then 100 cm / 25 cm = 4 pieces.

3. There are ____ cm in 2.54 km.

The question asks to convert kilometers to centimeters.

• Correct Answer: D (254000)

Explanation: $1 \text{ km} = 1000 \text{ m}$, and $1 \text{ m} = 100 \text{ cm}$. Therefore, $2.54 \text{ km} = 2.54 \times 1000 \times 100 = 254000 \text{ cm}.$

4. All of the statements below are true except:

The question asks which statement is false.

• Correct Answer: D (All whole numbers are positive integers)

Explanation: Whole numbers include 0, and 0 is not a positive integer. Therefore, the statement "All whole numbers are positive integers" is false.

5. How many forty thousand are there in one million?

• Correct Answer: C (25)

Explanation: $1,000,000 \div 40,000 = 25$. So, there are 25 forty-thousands in one million.

6. Carlo cycled for 8 miles. What is the equivalent of this distance in kilometers?

The question asks to convert 8 miles to kilometers.

• Correct Answer: C (12.9 km)

Explanation: The conversion factor from miles to kilometers is approximately 1 mile = 1.609 km. Thus, $8 \text{ miles} \times 1.609 \text{ km/mile} = 12.872 \text{ km} \approx 12.9 \text{ km}.$

7. A swimmer weighs 122 lbs. What is his weight in kg?

The question asks to convert pounds to kilograms.

• Correct Answer: A (55.3 kg)

Explanation: The conversion factor from pounds to kilograms is $1 \text{ lb} \approx 0.4536 \text{ kg}$. Therefore, $122 \text{ lbs} \times 0.4536 = 55.3392 \text{ kg} \approx 55.3 \text{ kg}.$

If you would like any more details or explanations, feel free to ask!

Additional questions:

1. How do you convert kilometers to meters and meters to centimeters?
2. Why is 0 not considered a positive integer?
3. How is the Greatest Common Factor (GCF) related to coprime numbers?
4. Can a whole number be a negative number? Explain.
5. How can you use fractions in real-world scenarios like dividing objects?

Tip: When converting units, always check the conversion factor and multiply carefully to ensure the correct units in your answer.