| Title | : | Fast Mental Multiplication Trick - multiply in your head using base 10 |
| Duration | : | 10 minutes, 50 seconds |
| Uploader | : | tecmath |
| Added On: | : | 22 February, 2013 |
| Views | : | 4.8M times |
| Likes | : | 0 |
| Source | : | YouTube |
This mental multiplication trick uses the idea of a third number - a base number - to help us multiply two numbers in your head. This series of videos first looks at multiplying numbers near 10 using base 10. The second video looks at multiplying using
