I remember how helpful it was to learn the trick to multiply by 9 on your hands.
Check out this article to learn that math trick and others like it:
This article was posted on Tuesday, March 27th, 2018 at 4:25 pm and is filed under Countries & Cultures, Learning, Mama Lisa, Math, Math, Math Tricks, School, Teaching, Tricks for Learning, USA. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.
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