Common Core Sheets 

Number and Operations in Base Ten 
Use place value understanding and properties of operations to add and subtract. 
4. Add within 100, including adding a twodigit number and a onedigit number, and adding a twodigit number and a multiple of 10, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used. Understand that in adding twodigit numbers, one adds tens and tens, ones and ones; and sometimes it is necessary to compose a ten. 
Example (Hover to Enlarge) 
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Adding Multiples of Ten 1nbt4
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Each worksheet has 20 problems adding (within 100) a 2 digit number and a multiple of ten.
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Adding Multiples of Ten (Horizontal) 1nbt4
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Each worksheet has 20 problems adding (within 100) a 2 digit number and a multiple of ten.
Create New SheetOne atta TimeFlash Cards


Adding Within 100 1nbt4
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Each worksheet has 20 problems finding the sum of numbers within 100.
Create New SheetOne atta TimeFlash Cards


Adding Within 100 (horizontal) 1nbt4
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Each worksheet has 20 problems finding the sum of numbers within 100.
Create New SheetOne atta TimeFlash Cards


Adding within 100 1nbt4
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Use addition or subtraction to solve the problem. 
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Include standard on Sheet Do not include modified sheet due date 