Place Value
Place value helps students see that a digit’s value depends on where it sits in a number. In early grades, that means building numbers with tens and ones; later, it grows into hundreds, thousands, decimals, and beyond. This topic hub mixes visual study, hands-on exploration, and practice so learners can connect abstract digits to real quantities.
Learning Path
Place Value & Number Sense
Use this quick visual guide to review ones, tens, hundreds, expanded form, and how place value supports number sense.
Open →Place Value Explorer
Build and break apart numbers to see how changing one digit changes the whole number.
Open →Place Value, Decimals & Scientific Notation Lab
Investigate how place value extends beyond whole numbers into decimals and larger number systems.
Open →Place Value Checklist
Keep these ideas in mind as you work with numbers.
- A digit’s value changes based on its position in a number.
- Expand numbers into place-value parts to understand and compare them.
- Place value supports regrouping in addition and subtraction, as well as estimation and rounding.
More Resources
Tools
Labs
Worksheets
Cheat Sheets
Infographics
Explainers
Common Questions
What is place value in math?
Place value tells you what each digit is worth based on its position, such as ones, tens, hundreds, or decimal places.
Why is place value important?
It helps students read and write numbers correctly, compare quantities, and understand addition, subtraction, rounding, and regrouping.