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  1. Addition Worksheets - Math-Drills

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  3. Addition Worksheets - Math is Fun

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  5. 100 Single-Digit Addition Questions With Some Regrouping (A) - Math-Drills

  6. Addition worksheets for K-5 - K5 Learning

  7. Dynamically Created Addition Worksheets - Math-Aids.Com

  8. Free Addition Worksheets - Math Salamanders

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

  10. Addition - Practice with Math Games