Texas Essential Knowledge and Skills (TEKS)
TX. 111.4. Grade 2, Adopted 2012.
2.4. Number and operations. The student applies mathematical process standards to develop and use strategies and methods for whole number computations in order to solve addition and subtraction problems with efficiency and accuracy. The student is expected to:
2.4 (A) Recall basic facts to add and subtract within 20 with automaticity.
2.4 (B) Add up to four two-digit numbers and subtract two-digit numbers using mental strategies and algorithms based on knowledge of place value and properties of operations.