CCSS 1.OA.B.3 Worksheets

Grade 1 · Operations & Algebraic Thinking

Apply properties such as commutativity and associativity as strategies to add and subtract.

Below are free printable worksheets that support 1.OA.B.3. 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

Apply properties such as commutativity and associativity as strategies to add and subtract.

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.