1. Common Core State Standards
2. Math
3. Content
4. Grade 2
5. Number And Operations In Base Ten

Use Place Value Understanding And Properties Of Operations To Add And Subtract.

Outcomes

• 2.NBT.5
  Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.
  Play Activities 82
  Examples
• 2.NBT.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.
  Play Activities 52
  Examples
• 2.NBT.8
  Mentally add 10 or 100 to a given number 100-900, and mentally subtract 10 or 100 from a given number 100-900.
  Play Activities 18
  Examples