Georgia Standards of Excellence
GA.MGSE2.OA. Operations and Algebraic Thinking
Add and subtract within 20.
MGSE2.OA.2. Fluently add and subtract within 20 using mental strategies. By end of Grade 2, know from memory all sums of two one-digit numbers.
GA.MGSE2.NBT. Number and Operations in Base Ten
Use place value understanding and properties of operations to add and subtract.
MGSE2.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.
MGSE2.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.
MGSE2.NBT.9. Explain why addition and subtraction strategies work, using place value and the properties of operations.