| Harold's Cheat Sheets | ||
| Harold's Basic Math Cheat Sheet | Docx | PEMDAS |
| Harold's Prime Numbers Cheat Sheet | Docx | Prime numbers |
| Harold's Times Tables Cheat Sheet | Docx | Multiplication patterns, 12 x 12, and 25 x 25 times tables practice sheets |
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| BarCharts QuickStudy Guide | ||
| Textbooks | ||
| Prealgebra 2e | Link | OpenStax free open-source textbook - Prealgebra |
| Links | ||
| WolframAlpha.com | Computational Knowledge Engine | |
| Wikipedia.org | The Free Encyclopedia that anyone can edit | |
| iPad Apps | Apple's App Store | |
| WolframAlpha | The Google of Mathematics | |
| Math Ref | Best Math, Physics, and Chemistry Formulas |
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Last updated 4 March 2025