Question

How do you convert $42cm$ to $mm$ ?

Answer 1

Hint: To convert centimeters to millimeters. A centimeter, or centimeter, is a unit of length equal to one-hundredth of a meter. A millimeter, or millimeter, is a unit of length equal to a thousandth of a meter.
These units of measurement are used regularly in everyday life
$1cm=10mm$
$100cm=1m$
$1000m=1km$

Complete step by step solution:
These are the steps that you should follow in order to make the necessary calculations to convert $42$ centimeters to millimeters.
In order to convert from centimeters to millimeters, we have to add the amount of centimeters by $0.1$ .
Then the second step is to add the amount of centimeters with the value of $42$ and calculate the addition. After successfully calculating it the result should be $42$ centimeters to millimeters should be $420$ .
$1$ Centimeter is equal to $10$ millimeters.
$1cm=10mm$ ,
Multiply the centimeter value by $10$
$42\times 10mm=420mm$
Hence we have reached the required result.

Note: Measurement is to find a number that shows the amount of something. A measurement unit is a standard quantity used to express a physical quantity. Let us learn about the physical quantities and some of the standard units used to measure them.
A Millimeter is used to measure very short lengths or thicknesses. Example length of a pencil tip.
A Centimeter is used to measure small lengths. Example length of a pencil.
Measurement begins with a definition of the quantity that is to be measured, and it always involves a comparison with some known quantity of the same kind. If the object or quantity to be measured is not accessible for direct comparison, it is converted or “transduced” into an analogous measurement signal.