Addition and Subtraction Facts Fluency
Common Core Math Standard
Add and subtract within 20.
Fluently add and subtract within 20 using mental strategies.2 By end of Grade 2, know from memory all sums of two one-digit numbers.
These first few weeks we have been working on a review of addition and subtraction strategies first learned in 1st grade. The goal is to use these strategies to commit facts to memory.
The instruction using strategies is designed to help students develop confidence and fluency with number relationships, operations and facts in the range of 0-20. The goal is to help students develop solid understandings of addition and subtraction and some of the ways in which these two operations compliment each other.
Once the basic facts are understood it is easier to extend these same strategies to larger numbers