This neat little trick shortcuts the multiplication process by breaking it into easy chunks that your brain can handle. The first thing you need to do is multiply the digits together, then double that result and add a zero, and then square each digit separately, and finally add up the results.
Slightly confused? Great – we made a video that outlines each step. There’s a definite pattern and flow to it. With practice, you will be able to do this one in your head within a very short time. Have fun!
Click the player to learn how to square any two-digit number:
Download Student Worksheet & Exercises
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Exercises
- 〖21〗^2
- 〖43〗^2
- 〖37〗^2
- 〖69〗^2
- 〖99〗^2
- 〖82〗^2
- 〖58〗^2
- 〖64〗^2
- 〖53〗^2
- 〖86〗^2