Measuring with a centimeter ruler means finding out how long something is by using centimeters (cm) as the unit of length. A centimeter is a small unit used to measure shorter objects.
Think of a centimeter as about the width of your pinky finger.
To measure correctly, line up one end of the object with the zero mark on the ruler. Then read the number at the other end of the object.
Do not start at the edge of the ruler. Always begin at the zero mark.
Everyday objects can be measured in centimeters. Knowing their sizes helps you compare and estimate lengths.
Smaller objects like coins or buttons may be only 1–3 cm wide.
We can use measurements to describe objects in clear and complete sentences.
Always include the unit “cm” when you write or say a measurement.