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    Addition using the standard algorithm.  

    Add and subtract within 1000, 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. Understand that in adding or subtracting three-digit numbers, one adds or subtracts hundreds and hundreds, tens and tens, ones and ones; and sometimes it is necessary to compose or decompose tens or hundreds.

     
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    Addition using the standard algorithm. 

    Add and subtract within 1000, 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. Understand that in adding or subtracting three-digit numbers, one adds or subtracts hundreds and hundreds, tens and tens, ones and ones; and sometimes it is necessary to compose or decompose tens or hundreds.

     
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    Addition using the standard Algorithm.  

    Add within 100, including adding a two-digit number and a one-digit number, and adding a two-digit 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 two-digit numbers, one adds tens and tens, ones and ones; and sometimes it is necessary to compose a ten.

     
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    Fluently add and subtract multi-digit whole numbers using the standard algorithm.

     
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    Fluently add and subtract multi-digit whole numbers using the standard algorithm.

     
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    Fluently add and subtract multi-digit whole numbers using the standard algorithm.

     
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    Fluently add and subtract multi-digit whole numbers using the standard algorithm.

     
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    Fluently add and subtract multi-digit whole numbers using the standard algorithm.

     
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    Fluently add and subtract multi-digit whole numbers using the standard algorithm.