Standard
- CCSS.Math.Content.2.NBT
- Number and Operations in Base Ten
- CCSS.Math.Content.2.NBT.B
- Use place value understanding and properties of operations to add and subtract.
- CCSS.Math.Content.2.NBT.B.5
- Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.