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This workbook has 100 days of reproducible addition and subtraction practice problems for digits 0-20. Use these pages as timed tests to improve fluidity or let students complete them at their leisure. Answer key is located at the back of the book. Workbook Contents:Adding Digits 0-5 ........................ pages 1-8Adding Digits 0-7 ....................... pages 9-16Adding Digits 0-10 ...................... pages 17-40Subtracting Digits 0-10 ............... pages 41-48Subtracting Digits 10-20 ............ pages 49-60Subtracting Digits 0-20 .............. pages 61-80Adding and Subtracting ............... pages 81-100(Answer Key in Back)