CCSS 1.OA.A.2 Worksheets

Grade 1 · Operations & Algebraic Thinking

Solve word problems that add three whole numbers with a total within 20.

Below are free printable worksheets that support 1.OA.A.2. Print them as PDFs, or generate a fresh one. Every math answer key is computed in code, so it is never wrong.

Teaching guide

What students learn

Solve word problems that add three whole numbers with a total within 20.

How to teach it

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.

Worked example

2 + 1 =

Answer: 3

Generated and checked in code, so it is correct.

Watch out for

Adding the tens and ones columns without carrying the regrouped ten, and always counting on from the first number rather than the larger.