Common Core Alignment:.

3.NBT.2:

Number And Operations In Base Ten

Use Place Value Understanding And Properties Of Operations To Perform Multi-Digit Arithmetic

Fluently add and subtract within 1000 using strategies and algorithms based on place value, properties of operations, and-or the relationship between addition and subtraction.

4.NBT.4:

Number And Operations In Base Ten

Use Place Value Understanding And Properties Of Operations To Perform Multi-Digit Arithmetic.

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