Common Core Sheets 

Number and Operations in Base Ten  
Use place value understanding and properties of operations to add and subtract.  
5.  Given a twodigit number, mentally find 10 more or 10 less than the number, without having to count; explain the reasoning used.  
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Finding 10 More and 10 Less 1nbt5
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Find 10 more or 10 less than the number shown. 
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Finding Ten More and Ten Less 1nbt5
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Each worksheet has 50 problems finding ten more or ten less than a two digit number. 
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Include CCSS on Sheet Do not include modified sheet due date 