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2nd Grade Math
7. 2.NBT.A.3
7.1 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
1
Adding numbers written in expanded form
2
Writing three-digit numbers from expanded notation
3
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
OH Curriculum Aligned