Create your own centimeter ruler. Then, estimate and measure with lengths with it. Warm up with a Mystery Math Mistake as you add two 2-digit numbers using a decomposition strategy. Think through ...

Learn how to change Ruler unit in Word, Excel, PowerPoint from default inches to cm, mm, points, picas via Settings, Registry or Group Policy Editor.

GIMP allows you to temporarily change the ruler's units, however, to inches, millimeters, picas, points, centimeters, meters, feet or yards if you prefer. Launch the GIMP image editing application.