---
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]]