## ◂Math Worksheets and Study Guides Second Grade. One More, One Less

### The resources above correspond to the standards listed below:

#### Alaska Content and Performance Standards

AK.2.OA. Operations and Algebraic Thinking
Add and subtract using numbers up to 20.
2.OA.2. Fluently add and subtract using numbers up to 20 using mental strategies. Know from memory all sums of two one-digit numbers.
AK.2.NBT. Number and Operations in Base Ten
Use place value understanding and properties of operations to add and subtract.
2.NBT.5. Fluently add and subtract using numbers up to 100.
2.NBT.5.a. Use strategies based on place value; properties of operations; and/or the relationship between addition and subtraction.
2.NBT.6. Add up to four two-digit numbers using strategies based on place value and properties of operations.
2.NBT.7. Add and subtract using numbers up to 1000.
2.NBT.7.a. Use concrete models or drawings and strategies based on place value; properties of operations; and/or relationship between addition and subtraction.
2.NBT.7.b. Relate the strategy to a written method and explain the reasoning used.
2.NBT.9. Explain or illustrate the processes of addition or subtraction and their relationship using place value and the properties of operations.