Know the difference between a centimeter and an inch. The centimeter (cm.) measures length and distance. It is part of the metric system, which is used worldwide. It is one-hundredth of a meter. An inch is a unit of measurement that measures length and distance. It is generally only used in the United States, Canada, and the United Kingdom. It is abbreviated as (in.) It is 1/12 of a foot and 1/36 of a yard. 1 cm. equals 0.394 inches.
Know the first formula for converting centimeters to inches. The formula is: [number of centimeters] X 0.39 = [number of inches]. This equation means that, using a calculator, you take the number of centimeters you want to convert, multiply them by 0.39 and you will have the number of inches. For example, if you want to convert 10 centimeters to inches, the equation would be written like this: 10 cm X 0.39 = 3.9 inches.
Know the second formula. The second formula is: [number of centimeters] / 2.54. This means, you take the number of centimeters you want to convert and divide it by the number 2.54. ____ cm * 1 in 2.54 cm = ? in If you wanted to convert 10 cm to inches, the equation would be: 10 cm /2.54 = 3.93 inches
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