Normally, I do not write about mental math on my blog, but we had a really good mental math assignment today. I agree that mental math is helping us to think outside the box. The symmetry question really got me thinking. Oftentimes I know that stuff works, but understanding how they work is what makes math exciting. I also learned about greatest common multiples. When dealing with 2,3,and 4, the greatest common multiple is 12. I treated it as a greatest common factor question, and wrote 1. Now I know better. Today, I will continue work on the cosine law.
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