ABO NOCE Practice Test

To convert a length in centimeters to millimeters, what operation should be performed?

1. Add 100

2. Subtract 1

3. Multiply by 10

4. Multiply by 1000

The correct answer is: Multiply by 10

To convert a length from centimeters to millimeters, the appropriate operation to perform is to multiply by 10. This is because there are 10 millimeters in every centimeter. Therefore, if you have a length measured in centimeters and you want to find its equivalent in millimeters, you simply take that measurement in centimeters and multiply it by 10. For example, if you have 5 centimeters and you multiply it by 10, you will get 50 millimeters, demonstrating how the conversion works. This method ensures that the length is expressed in the smaller unit of millimeters, which allows for more precise measurements when necessary, particularly in fields requiring meticulous measurement, such as engineering or manufacturing. The other operations do not accurately reflect the relationship between centimeters and millimeters, making them unsuitable for this conversion.