Mental Math (2-Digit Multiplication) Strategies
This 30-page file contains three strategies for mental computation of 2-digit numbers of varying types. The ability to compute numbers mentally increases number sense and confidence. It has also been shown to be an accurate predictor of mathematical success in future endeavors. Mental computation tricks like this should only be taught after the concept has been learned and the standard algorithm has been mastered. Also keep in mind that tricks like this are to be used as additional tools — to be used as the owner of the tools sees fit.
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