How Long Is It?
Measuring helps us find out the size of things. We can use rulers or even paperclips!
Note: All Khan Academy content is available for free at www.khanacademy.org
The Golden Rule of Measuring
Always line up the end of your object with the 0 mark on your tool!
If you don't start at 0, your measurement will be wrong. We call the things we use to measure Units.
How many units long?
012345678
🏆 Measurement Pro!
You know how to use tools to find the length of any object. You're a math scientist!