---
title: Subtraction Facts to 20
created: '2026-05-26'
updated: '2026-05-26'
type: lesson_topic
subject: math
tags:
- math
- grade-2
- homeschool
- ccss
standard: 2.NBT.A, 2.OA.A
phase: 1
phase_name: "Number Sense & Foundations (Weeks 1\u20136)"
weeks:
- 5
source: ''
---
# Subtraction Facts to 20
Second grade math topic covering subtraction facts to 20. Part of Phase 1 (Number Sense & Foundations (Weeks 1–6)).
## Key Concepts
Fluency drills, relationship to addition, fact families
## Standards
2.NBT.A, 2.OA.A
## Related Topics
[[counting-number-sense-to-100]], [[place-value-tens-ones]], [[comparing-ordering-numbers]], [[addition-facts-to-20]]
---
*Generated from curriculum data* ^[[raw/curriculum/math]]