CCSS 2.OA.B.2 Worksheets
Grade 2 · Operations & Algebraic Thinking
Add and subtract within 20 using mental strategies, knowing all sums of one digit numbers from memory.
Below are free printable worksheets that support 2.OA.B.2. Print them as PDFs, or generate a fresh one. Every math answer key is computed in code, so it is never wrong.
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Deliver a whole lesson on 2.OA.B.2 from a textbook-grade teaching unit, with a hook, worked examples, diagrams, misconceptions, and an exit ticket.
Teaching guide
Add and subtract within 20 using mental strategies, knowing all sums of one digit numbers from memory.
Start by counting on from the larger number, then move to partitioning into tens and ones and adding each part, and finally column addition with regrouping.
Generated and checked in code, so it is correct.
Adding the tens and ones columns without carrying the regrouped ten, and always counting on from the first number rather than the larger.