Common Core Sheets 

Number and Operations in Base Ten 
Use place value understanding and properties of operations to add and subtract. 
5. Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction. 
Example (Hover to Enlarge) 
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Solving Mixed Problems within 100 (+ ) 2nbt5
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Each worksheet has 20 problems solving addition and subtraction problems.
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Subtracting within 100 2nbt5
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Add or subtract the numbers shown. 

2 Digit Minus 2 Digit 2nbt5
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Each worksheet has 20 problems with numbers below 100.
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Subtracting Across Zero 2nbt5
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Each worksheet has 20 problems with 1 zero in larger number.
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Add & Subtract within 100 2nbt5
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Each worksheet has 20 problems finding the value of a variable.
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