Common Core Sheets 

Next Standard ►
2oa2
Fluently add and subtract within 20 using mental strategies. By end of Grade 2, know from memory all sums of two onedigit numbers. 
Operations and Algebraic Thinking 
Represent and solve problems involving addition and subtraction. 
1. Use addition and subtraction within 100 to solve one and twostep word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem. 
Example (Hover to Enlarge) 
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Word Addition Within 100 2oa1
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Each worksheets has 12 problems finding the result of an addition problem.
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Add & Subtract 2oa1
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Each worksheet has 10 problems where answer is found by adding and then subtracting.
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Subtract & Add 2oa1
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Each worksheet has 10 problems where answer is found by subtracting and then adding.
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Subtracting within 100 (horizontal) 2oa1
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Each worksheet has 20 problems subtracting within 100.
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Word Subtraction Within 100 2oa1
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Each worksheets has 12 problems finding the result of a subtraction problem.
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