Question

are asked for will appear.
if you decide that the box you clicked on is not the correct length, click in the box again and the value will disappear. then, click in the box that you think is correct.
click in the box with the blue arrow pointing to 1 kilometer on this line:
0 1/2 mi 1 mi 1 1/2 mi 2 mi 2 1/2 mi
click in the box with the blue arrow pointing to 1 mile on this line:
0 1/2 km 1 km 1 1/2 km 2 km 2 1/2 km
click in the box with the blue arrow pointing to 500 meters on this line:
0 1/2 km 1 km 1 1/2 km 2 km 2 1/2 km

Explanation:

Step1: Convert 1 km to miles

We know $1 \text{ km} \approx 0.621 \text{ mi}$, which is between $0$ and $\frac{1}{2} \text{ mi}$? No, $\frac{1}{2} \text{ mi}=0.5\text{ mi}$, $0.621\text{ mi}$ is between $\frac{1}{2}\text{ mi}$ and $1\text{ mi}$. Wait, first, confirm conversion: $1 \text{ mile} \approx 1.609 \text{ km}$, so $1 \text{ km} = \frac{1}{1.609} \approx 0.621 \text{ mi}$. So on the first number line (0 to 2.5 mi), 1 km is the second blue arrow (between 0.5 mi and 1 mi).

Step2: Convert 1 mile to km

$1 \text{ mi} \approx 1.609 \text{ km}$, which is between $1\text{ km}$ and $1.5\text{ km}$ on the second number line, so the third blue arrow.

Step3: Convert 500 meters to km

$500 \text{ m} = 0.5 \text{ km}$, which is the second blue arrow on the third number line (at the $\frac{1}{2}\text{ km}$ mark).

Answer:

1. For 1 kilometer: The box above the blue arrow between $\frac{1}{2}$ mi and 1 mi (second box from left)
2. For 1 mile: The box above the blue arrow between 1 km and $1\frac{1}{2}$ km (third box from left)
3. For 500 meters: The box above the blue arrow at $\frac{1}{2}$ km (second box from left)