Fill in the blanks
`25 cm = "_______________" km `

Answer

To convert 25 cm into kilometers, we can follow these steps:

### Step 1: Convert centimeters to meters
We know that:
1 meter = 100 centimeters

To convert 25 centimeters to meters, we can use the formula:
\[ \text{meters} = \frac{\text{centimeters}}{100} \]
So,
\[ \text{meters} = \frac{25}{100} = 0.25 \text{ meters} \]

### Step 2: Convert meters to kilometers
Next, we need to convert meters to kilometers. We know that:
1 kilometer = 1000 meters

To convert 0.25 meters to kilometers, we can use the formula:
\[ \text{kilometers} = \frac{\text{meters}}{1000} \]
So,
\[ \text{kilometers} = \frac{0.25}{1000} \]

### Step 3: Simplify the fraction
To simplify \(\frac{0.25}{1000}\), we can express 0.25 as a fraction:
\[ 0.25 = \frac{25}{100} \]
Thus,
\[ \text{kilometers} = \frac{25}{100} \times \frac{1}{1000} = \frac{25}{100000} \]

### Step 4: Convert to decimal
Now we can convert \(\frac{25}{100000}\) to decimal form. To do this, we divide 25 by 100000:
\[ \text{kilometers} = 0.00025 \]

### Final Answer
Thus, we can fill in the blank:
\[ 25 \text{ cm} = 0.00025 \text{ km} \]

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