How do you convert centimeters to millimeters?

How do you convert centimeters to millimeters?

• A. 0.1 cm = 1 mm
• B. 1.0 cm = 10.0 mm
• C. 10.0 cm = 100 mm
• D. 1.0 cm = 1.0 mm

Answer: (B)

There are 10 millimeters in one centimeter, so converting from centimeters to millimeters means multiplying by 10. That makes 1.0 cm equal to 10.0 mm, which is the standard and clearest way to express the conversion. For any length in centimeters, multiplying by 10 gives the length in millimeters (for example, 2.3 cm becomes 23.0 mm). Other presented relationships are equivalent (0.1 cm = 1 mm, or 10.0 cm = 100 mm), but the direct and most useful form is 1 cm = 10 mm.

There are 10 millimeters in one centimeter, so converting from centimeters to millimeters means multiplying by 10. That makes 1.0 cm equal to 10.0 mm, which is the standard and clearest way to express the conversion. For any length in centimeters, multiplying by 10 gives the length in millimeters (for example, 2.3 cm becomes 23.0 mm). Other presented relationships are equivalent (0.1 cm = 1 mm, or 10.0 cm = 100 mm), but the direct and most useful form is 1 cm = 10 mm.