Go Math
Chapter 6
3-Digit Addition and Subtraction

Cluster B:  Use place value understanding and properties of operations to add and subtract.

Mathematical Practices
*Make sense of problems and persevere in solving them.
*Reason abstractly and quantitatively.
*Construct viable arguments and critique the reasoning of others.
*Model with mathematics.
*Use appropriate tools strategically.
*Attend to precision.
*Look for and make use of structure.
*Look for and express regularity in repeated reasoning.