← All standards
Common CoreCCSS.Math.Content.1.OA.4CCSS-2010

Understand subtraction as an unknown-addend problem

Common Core·math·Grade 1·Bloom: Understand·Last verified: May 21, 2026

Understand subtraction as an unknown-addend problem.

🎯 Practice this standard →Open publisher source ↗

Skills that teach this standard (2)

2 with free practice questions
Finding a missing number in addition →
Addition & Subtraction · Ages 6–7 · try 3 free questions
Inverse: addition undoes subtraction →
Addition & Subtraction · Ages 6–7 · try 3 free questions

Concepts covered (0)

Showing all

No concepts mapped to this standard yet. Our curriculum library is expanding — check back soon.

Standards are re-verified against the publisher source quarterly. See all standards →