30 Second Challenge: The Fun Way to Learn Mathematics
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|Norman D. Lock|
|e-Books (PDF format) that provide an entertaining approach to developing mental arithmetic skills.|
|Levels:||Elementary, Middle School (6-8), High School (9-12)|
|Resource Types:||Problems/Puzzles, Educational Vendors, Books|
|Math Topics:||Basic Operations, Fractions/Decimals/Percents|
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