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Earth Day Themed Addition and Subtraction Worksheets. All problems are within 20. Fast Facts. Word Problems. Missing Addends. Adding and Subtracting within 20. Determining if problems are true or false. Determining an unknown whole number in an addition or subtraction problem. This is also a part of HHoliday Addition/Subtraction within 20 Bundle.
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**An Answer Key is Provided**
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