# Three-Digit Addition and Subtraction Common Core Math Unit for Second Grade

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This 51-page unit explores the world of three-digit addition and subtraction, satisfying the following common core second grade math standard: CCSS.Math.Content.2.NBT.B.7
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.

Printables Included:
Adding Hundreds to a Three-Digit Number (4 Lessons)
Estimating Sums (4 Lessons)
Comparing Sums (4 Lessons)
Three-Digit Addition Word Problems (4 Lessons)
Exploring Three-Digit Subtraction (4 Lessons)
Finding Missing Parts (4 Lessons)
Estimating Differences (4 Lessons)
Comparing Differences (4 Lessons)
Three-Digit Subtraction Word Problems (4 Lessons)
Adding and Subtracting Three-Digit Numbers (4 Lessons)
Three-Digit Addition and Subtraction Study Guide
Three-Digit Addition and Subtraction Math Test

I created this packet because I was unhappy with the textbook materials my students were using. This packet does a much better job of teaching the common core standard of three-digit addition and subtraction and progresses in a fashion where students can understand and keep up with the material. I hope you find it useful, too! Thanks bunches, and enjoy!!! :)
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51 pages
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