Overview

Grade 2 Math

B1. Number Sense

1. B1.1 Whole Numbers

1.7 Expanded form up to 999

Expanded Form Up to 999

Discover how to break any number up to 999 into hundreds, tens, and ones and write it in expanded form with easy step by step examples.

What You'll Learn

Identify the hundreds, tens, and ones digits in a 3 digit number before expanding it

Apply the pattern \( 100h + 10t + o \) to rewrite any number in expanded form

Recognize that expanded form shows the value each digit contributes, such as \( 452 = 400 + 50 + 2 \)

Convert between standard form and expanded form to check that your answer matches the original number

Compare expanded form to place value models to see why each digit's position matters

What You'll Practice

Adding numbers written in expanded form

Writing three-digit numbers from expanded notation

Converting standard numbers to expanded form

Why This Matters

Expanded form builds your understanding of place value, which is the foundation for all math operations with larger numbers. This skill helps you add, subtract, multiply, and divide accurately by understanding what each digit truly represents.

This Unit Includes

Practice exercises

Learning resources

Skills

Place Value

Expanded Form

Standard Form

Three-Digit Numbers

Number Sense

ON Curriculum Aligned