Unit conversion practice worksheet for converting between millimeters, centimeters, meters, and kilometers.

To solve the unit conversion problems, we need to use the relationships between the units of length in the metric system:

1. 1 cm = 10 mm
2. 1 m = 100 cm
3. 1 km = 1000 m

Using these relationships, we can convert the given values step by step.

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Solutions:

#### 1) 18 mm = _______ cm
- Conversion: \( 1 \text{ cm} = 10 \text{ mm} \)
- Calculation: \( 18 \text{ mm} \div 10 = 1.8 \text{ cm} \)
- Answer: \( 1.8 \text{ cm} \)

#### 2) 3 m = _______ mm
- Conversion: \( 1 \text{ m} = 1000 \text{ mm} \)
- Calculation: \( 3 \text{ m} \times 1000 = 3000 \text{ mm} \)
- Answer: \( 3000 \text{ mm} \)

#### 3) 32.5 cm = _______ mm
- Conversion: \( 1 \text{ cm} = 10 \text{ mm} \)
- Calculation: \( 32.5 \text{ cm} \times 10 = 325 \text{ mm} \)
- Answer: \( 325 \text{ mm} \)

#### 4) 17.8 m = _______ cm
- Conversion: \( 1 \text{ m} = 100 \text{ cm} \)
- Calculation: \( 17.8 \text{ m} \times 100 = 1780 \text{ cm} \)
- Answer: \( 1780 \text{ cm} \)

#### 5) 6.3 km = _______ m
- Conversion: \( 1 \text{ km} = 1000 \text{ m} \)
- Calculation: \( 6.3 \text{ km} \times 1000 = 6300 \text{ m} \)
- Answer: \( 6300 \text{ m} \)

#### 6) 5,989 cm = _______ m
- Conversion: \( 1 \text{ m} = 100 \text{ cm} \)
- Calculation: \( 5,989 \text{ cm} \div 100 = 59.89 \text{ m} \)
- Answer: \( 59.89 \text{ m} \)

#### 7) 610 cm = _______ m
- Conversion: \( 1 \text{ m} = 100 \text{ cm} \)
- Calculation: \( 610 \text{ cm} \div 100 = 6.1 \text{ m} \)
- Answer: \( 6.1 \text{ m} \)

#### 8) 234 mm = _______ cm
- Conversion: \( 1 \text{ cm} = 10 \text{ mm} \)
- Calculation: \( 234 \text{ mm} \div 10 = 23.4 \text{ cm} \)
- Answer: \( 23.4 \text{ cm} \)

#### 9) 4.9 m = _______ mm
- Conversion: \( 1 \text{ m} = 1000 \text{ mm} \)
- Calculation: \( 4.9 \text{ m} \times 1000 = 4900 \text{ mm} \)
- Answer: \( 4900 \text{ mm} \)

#### 10) 510 cm = _______ mm
- Conversion: \( 1 \text{ cm} = 10 \text{ mm} \)
- Calculation: \( 510 \text{ cm} \times 10 = 5100 \text{ mm} \)
- Answer: \( 5100 \text{ mm} \)

#### 11) 1,900 mm = _______ m
- Conversion: \( 1 \text{ m} = 1000 \text{ mm} \)
- Calculation: \( 1,900 \text{ mm} \div 1000 = 1.9 \text{ m} \)
- Answer: \( 1.9 \text{ m} \)

#### 12) 7,692 m = _______ km
- Conversion: \( 1 \text{ km} = 1000 \text{ m} \)
- Calculation: \( 7,692 \text{ m} \div 1000 = 7.692 \text{ km} \)
- Answer: \( 7.692 \text{ km} \)

#### 13) 3,210 m = _______ km
- Conversion: \( 1 \text{ km} = 1000 \text{ m} \)
- Calculation: \( 3,210 \text{ m} \div 1000 = 3.21 \text{ km} \)
- Answer: \( 3.21 \text{ km} \)

#### 14) 96 m = _______ cm
- Conversion: \( 1 \text{ m} = 100 \text{ cm} \)
- Calculation: \( 96 \text{ m} \times 100 = 9600 \text{ cm} \)
- Answer: \( 9600 \text{ cm} \)

#### 15) 37 cm = _______ mm
- Conversion: \( 1 \text{ cm} = 10 \text{ mm} \)
- Calculation: \( 37 \text{ cm} \times 10 = 370 \text{ mm} \)
- Answer: \( 370 \text{ mm} \)

#### 16) 4.65 km = _______ m
- Conversion: \( 1 \text{ km} = 1000 \text{ m} \)
- Calculation: \( 4.65 \text{ km} \times 1000 = 4650 \text{ m} \)
- Answer: \( 4650 \text{ m} \)

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Final Answers:

1. \( 1.8 \text{ cm} \)
2. \( 3000 \text{ mm} \)
3. \( 325 \text{ mm} \)
4. \( 1780 \text{ cm} \)
5. \( 6300 \text{ m} \)
6. \( 59.89 \text{ m} \)
7. \( 6.1 \text{ m} \)
8. \( 23.4 \text{ cm} \)
9. \( 4900 \text{ mm} \)
10. \( 5100 \text{ mm} \)
11. \( 1.9 \text{ m} \)
12. \( 7.692 \text{ km} \)
13. \( 3.21 \text{ km} \)
14. \( 9600 \text{ cm} \)
15. \( 370 \text{ mm} \)
16. \( 4650 \text{ m} \)

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Boxed Final Answer:

\[
\boxed{
\begin{array}{ll}
1. & 1.8 \text{ cm} \\
2. & 3000 \text{ mm} \\
3. & 325 \text{ mm} \\
4. & 1780 \text{ cm} \\
5. & 6300 \text{ m} \\
6. & 59.89 \text{ m} \\
7. & 6.1 \text{ m} \\
8. & 23.4 \text{ cm} \\
9. & 4900 \text{ mm} \\
10. & 5100 \text{ mm} \\
11. & 1.9 \text{ m} \\
12. & 7.692 \text{ km} \\
13. & 3.21 \text{ km} \\
14. & 9600 \text{ cm} \\
15. & 370 \text{ mm} \\
16. & 4650 \text{ m} \\
\end{array}
}
\]