# CCSS.1.OA.A.2

addition, three addends, word problems; solve, represent.

System: US Common Core Math
Route: /math/standards/us-ccss/curratom-us-ccss-1-oa-a-2
Skills: 2

## Skills and Examples

- [Add Sub Word Problems One Step](/math/skills/oa/add-sub-word-problems-one-step) — Operations Models, Bar Models, and Word Problems
- [Add Within 20 Strategies](/math/skills/oa/add-within-20-strategies) — Whole-Number Operations and Fact Fluency