To convert centimeters (cm) to kilometers (km), follow these steps:

1. **Conversion Factors**:
   - \(1 \text{ cm} = 0.01 \text{ m}\)
   - \(1 \text{ m} = 0.001 \text{ km}\)
   
   Therefore:
   \[
   1 \text{ cm} = 0.00001 \text{ km}
   \]

2. **Convert 1287.321 cm to km**:
   \[
   1287.321 \text{ cm} \times 0.00001 \text{ km/cm} = 0.01287321 \text{ km}
   \]

So, **1287.321 cm is equal to 0.01287321 km**.

Would you like further details or have any questions?

Here are some related questions you might find interesting:
1. How many meters are in 1287.321 cm?
2. Convert 0.01287321 km to meters.
3. How many millimeters are in 1287.321 cm?
4. What is 5000 cm in kilometers?
5. How many kilometers are there in 1 million centimeters?
6. Convert 0.05 km to centimeters.
7. How would you convert 3.5 km to centimeters?
8. What is 10 cm in kilometers?

**Tip:** When converting between units, it helps to remember key conversion factors, like 1 cm = 0.00001 km.

Learn how to convert 1287.321 centimeters to kilometers with detailed steps and explanation. Understand the conversion factors and the process involved in converting cm to km. Suitable for students in Grades 4-6.

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