CCSS 1.OA.B.4 Worksheets

Grade 1 · Operations & Algebraic Thinking

Understand subtraction as finding an unknown addend, linking it to a related addition fact.

Below are free printable worksheets that support 1.OA.B.4. 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

Understand subtraction as finding an unknown addend, linking it to a related addition fact.

How to teach it

Model 'take away' and 'difference' (counting up) with objects and a number line. For larger numbers, partition or use column subtraction with regrouping.

Worked example

1 - 1 =

Answer: 0

Generated and checked in code, so it is correct.

Watch out for

Subtracting the smaller digit from the larger in each column regardless of order, instead of regrouping.