To convert millimeters to inches, follow these steps:
Step 1: Write down the conversion factor from millimeters to inches.
1 millimeter (mm) = 0.0393701 inches (in)
Step 2: Write down the given length in millimeters.
For example, let’s say the length given is 100 millimeters.
Step 3: Set up the conversion equation with the given length in millimeters and the conversion factor from step 1.
100 mm x (0.0393701 in/1 mm) = ?
Step 4: Cancel out the common unit, millimeters, on the top and bottom of the conversion factor.
100 mm x (0.0393701 in/1 mm) = 100 x (0.0393701 in)
Step 5: Simplify the equation.
100 x (0.0393701 in) = 3.93701 in
Step 6: Round off the final answer to the appropriate number of significant figures. In this case, since 100 only has one significant figure, the final answer should be rounded to one decimal place.
Therefore, 100 millimeters is equal to 3.9 inches.
Final answer: 100 mm = 3.9 in
In summary, to convert millimeters to inches:
1. Write down the conversion factor from millimeters to inches.
2. Write down the given length in millimeters.
3. Set up the conversion equation with the given length in millimeters and the conversion factor.
4. Cancel out the common unit, millimeters, on the top and bottom of the conversion factor.
5. Simplify the equation.
6. Round off the final answer to the appropriate number of significant figures.