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  1. Addition - Practice with Math Games

  2. Addition Worksheets - Math-Drills

  3. Addition worksheets for K-5 - K5 Learning

  4. What is Addition? Definition, Formula, Properties & Examples

  5. Addition - Math is Fun

  6. Free Addition Worksheets—Printable with Answers - Mashup Math

  7. Addition - Meaning, Symbol, Parts of Addition, Methods, …

  8. 28 Free Hands-On Addition Activities and Online Games

  9. Addition in Math: Definition, Examples, Formulas

  10. Addition Worksheets - Math is Fun