About Us

Why Choose StudyPug

How it Works

Pricing

Testimonials

Contact Us

Blog

Basic Math

Algebra

Geometry

Trigonometry

Calculus

Linear Algebra

Differential Equations

Statistics

Chemistry

Organic Chemistry

Physics

Microeconomics

For Students

For Parents

For Home Schoolers

For Teachers

Australia

Canada

Ireland

New Zealand

Singapore

United Kingdom

United States

México

Latinoamérica

Sitemap

Terms of Service

Privacy Policy

Accessibility

Adding with 3 Numbers up to 20: Grouping Addends Strategy

NY.1.G.1

Sorting 2D shapes by a single attribute

Sorting 3D shapes by a single attribute

NY.1.G.2

Composing 2D shapes

Composing 3D shapes

NY.1.MD.1

Comparing lengths

NY.1.MD.2

Long and short

NY.1.MD.3

Reading the clock

NY.1.MD.4

Interpreting graphs

Creating graphs

NY.1.NBT.1

Converting dot grids to numbers up to 100

Counting Dots in a Grid — Up to 100

auto-gen

Missing values in a number grid up to 100

Counting on a Number Grid — Up to 100

NY.1.NBT.2

Place values of digits up to 99

Tens and Ones — Up to 99

Numeral expanding up to 99

Place Value Numeral Expansion — Up to 99

Place Value Numeral Expansion — Up to 50

NY.1.NBT.3

Comparing values up to 99

Comparing Models — Up to 99

Comparing Numbers — Up to 99

NY.1.NBT.4

Adding with digits up to 20

Add By Digits — Up to 20

NY.1.NBT.5

Adding numbers with 5s and 10s

Adding Five — Up to 20

Adding Ten — Up to 20

NY.1.OA.1

Addition word problems up to 20

Addition Word Problems — Up to 20

Subtraction word problems up to 20

Subtraction Word Problems — Up to 20

Subtraction Word Problems (Up to 20)

NY.1.OA.2

Adding with 3 numbers up to 20

Add Three Numbers — Up to 20

NY.1.OA.3

Using number line to add up to 20

Using number line to subtract up to 20

NY.1.OA.4

Completing subtraction statements up to 20

Subtraction Fill in the Blank — Up to 20

NY.1.OA.5

Using counting to add digits up to 20

Add By Counting — Up to 20

Counting forward to subtract up to 20

Count Forwards to Subtract — Up to 20

NY.1.OA.6

Addition facts up to 20

Addition Facts — Up to 20

Subtraction facts up to 20

Subtraction Properties — Up to 20

NY.1.OA.7

Verifying addition statements

Addition True or False Statements — Up to 20

Verifying subtraction statements

Subtraction Language

NY.1.OA.8

Addition with regrouping up to 20

Add By  Regrouping — Up to 20

Add By Regrouping — Up to 20

Understanding the subtraction sign

Assignments

Challenge Zone

Foundation Review

1st Grade Math

math

Intro: Adding With 3 Numbers Up To 20

Introducing adding three numbers using mental math strategies

This lesson teaches students how to add three numbers with a sum up to 20. It covers the associative property (adding in any order), the make-a-ten strategy for grouping addends efficiently, and step-by-step worked examples to build fluency and confidence with multi-addend addition problems.

Adding with 3 Numbers up to 20 | StudyPug

MY PROGRESS

Pug Score

Get Started

Topic Progress

Pug Score

Practice

Practice content will appear here.

Fetching practice data now.