This files contains 6 printables that correlate with Common Core 2.OA.B.2, as well as some helpful hints and tips. These pages can be used as guided practice, independent practice or homework. They are also a great way to review!
2.OA.B.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.