---
title: "1.NR.5: Addition and Subtraction Within 100 (Georgia Mathematics standard)"
code: 1.NR.5
cite_as: Georgia Standards of Excellence, Mathematics, 1.NR.5
subject: math
grades:
  - grade-1
language: en
canonical_url: https://georgiahomeroom.org/standards/code/1.NR.5
md_url: https://georgiahomeroom.org/standards/code/1.NR.5.md
alternate_language_url: https://georgiahomeroom.org/es/standards/code/1.NR.5.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.5: Addition and Subtraction Within 100

Use concrete models, the base ten structure, and properties of operations to add and subtract within 100.

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

## Expectations

- **1.NR.5.1**: Use a variety of strategies to solve applicable, mathematical addition and subtraction problems with one- and two-digit whole numbers.
- **1.NR.5.2**: Given a two-digit number, mentally find 10 more or 10 less than the number, without having to count; explain the reasoning used.
- **1.NR.5.3**: Add and subtract multiples of 10 within 100.

## Georgia Milestones coverage

No Georgia Milestones blueprint cites this standard.

## The same standard across grades

- Kindergarten, K.NR.5: Explain the concepts of addition, subtraction, and equality and use these concepts to solve real-life problems within 10. https://georgiahomeroom.org/standards/code/K.NR.5.md
- **Grade 1, 1.NR.5 (this standard)**: Use concrete models, the base ten structure, and properties of operations to add and subtract within 100.
- Grade 4, 4.NR.5: Solve real-life problems involving addition, equivalence, comparison of fractions with denominators of 10 and 100, and comparison of decimal numbers as tenths and hundredths using part-whole strategies and visual models. https://georgiahomeroom.org/standards/code/4.NR.5.md
- Grade 5, 5.NR.5: Write, interpret, and evaluate numerical expressions within authentic problems. https://georgiahomeroom.org/standards/code/5.NR.5.md

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