---
title: "1.NR.2: Addition & Subtraction Relationship (Georgia Mathematics standard)"
code: 1.NR.2
cite_as: Georgia Standards of Excellence, Mathematics, 1.NR.2
subject: math
grades:
  - grade-1
language: en
canonical_url: https://georgiahomeroom.org/standards/code/1.NR.2
md_url: https://georgiahomeroom.org/standards/code/1.NR.2.md
alternate_language_url: https://georgiahomeroom.org/es/standards/code/1.NR.2.md
source_url: https://case.georgiastandards.org/ims/case/v1p1/CFDocuments/e9dd7229-3558-4df2-85c6-57b8938f6180
source_last_changed: 2024-10-09
data_built: 2026-09-18
publisher: Georgia Homeroom, a free public-interest project of Georgia Civic Data. Not affiliated with or endorsed by the Georgia Department of Education or any school district.
up: https://georgiahomeroom.org/standards/math/grade-1.md
index: https://georgiahomeroom.org/standards/index.md
---

# 1.NR.2: Addition & Subtraction Relationship

Explain the relationship between addition and subtraction and apply the properties of operations to solve real-life addition and subtraction problems within 20.

- Subject: Mathematics
- Appears in: Grade 1, https://georgiahomeroom.org/standards/math/grade-1.md

## Expectations

- **1.NR.2.1**: Use a variety of strategies to solve addition and subtraction problems within 20.
- **1.NR.2.2**: Use pictures, drawings, and equations to develop strategies for addition and subtraction within 20 by exploring strings of related problems.
- **1.NR.2.3**: Recognize the inverse relationship between subtraction and addition within 20 and use this inverse relationship to solve authentic problems.
- **1.NR.2.4**: Fluently add and subtract within 10 using a variety of strategies.
- **1.NR.2.5**: Use the meaning of the equal sign to determine whether equations involving addition and subtraction are true or false.
- **1.NR.2.6**: Determine the unknown whole number in an addition or subtraction equation relating to three whole numbers.
- **1.NR.2.7**: Apply properties of operations as strategies to solve addition and subtraction problem situations within 20.

## Georgia Milestones coverage

No Georgia Milestones blueprint cites this standard.

## The same standard across grades

- Kindergarten, K.NR.2: Use count sequences within 100 to count forward and backward in sequence. https://georgiahomeroom.org/standards/code/K.NR.2.md
- **Grade 1, 1.NR.2 (this standard)**: Explain the relationship between addition and subtraction and apply the properties of operations to solve real-life addition and subtraction problems within 20.
- Grade 2, 2.NR.2: Apply multiple part-whole strategies, properties of operations and place value understanding to solve real-life, mathematical problems involving addition and subtraction within 1,000. https://georgiahomeroom.org/standards/code/2.NR.2.md
- Grade 4, 4.NR.2: Using part-whole strategies, solve problems involving addition and subtraction through the hundred-thousands place, as well as multiplication and division of multi-digit whole numbers presented in real-life, mathematical situations. https://georgiahomeroom.org/standards/code/4.NR.2.md
- Grade 5, 5.NR.2: Multiply and divide multi-digit whole numbers to solve relevant, mathematical problems. https://georgiahomeroom.org/standards/code/5.NR.2.md
- Grade 6, 6.NR.2: Apply operations with whole numbers, fractions and decimals within relevant applications. https://georgiahomeroom.org/standards/code/6.NR.2.md
- Grade 8, 8.NR.2: Solve problems involving radicals and integer exponents including relevant application situations; apply place value understanding with scientific notation and use scientific notation to explain real phenomena. https://georgiahomeroom.org/standards/code/8.NR.2.md

Source: Georgia Standards of Excellence, published by the Georgia Department of Education at case.georgiastandards.org.