Metric Ruler

A metric ruler is based on the International System of Units (SI), sometimes called the metric system, and is divided into either millimeters or centimeters instead of inches. Rulers are often 30 centimeters long, which are designated by large numbers on the ruler. Between each centimeter (cm) mark, there should be 10 smaller marks called millimeters (mm).

• Make sure you read the ruler from left to right. If you are measuring an object, align it with the left side of the zero mark on the ruler. The left side of the line where the object ends will be its measurement in centimeters. This way the line thickness will not affect the measurement.

• Unlike with the English ruler, the measurements for the metric ruler are written in decimals instead of fractions. For example, 1/2 a centimeter is written as 0.5 cm.

Now practice SI or Metric Measurements with this ruler game:

https://www.rulergame.net/v2-metric-ruler-game.php

If you are still having issues Check out these links:

• https://m.wikihow.com/Read-a-Ruler

• https://www.inchcalculator.com/how-to-read-a-ruler/

• https://www.mathatube.com/measurement-reading-a-ruler-starderd-unite