Type any number and each digit lights up in its correct column. See the expanded form and number words instantly!
Each digit in a number has a value that depends on its position. In 437, the 4 is worth 400, the 3 is worth 30, and the 7 is worth 7. That's why it's called place value!
Expanded form breaks a number apart to show the value of each digit separately: 437 = 400 + 30 + 7. This helps you understand what each digit really means.
This free interactive math tool helps students visualize and understand mathematical concepts. Instead of memorizing procedures, students can see how numbers work through visual models, manipulatives, and step-by-step animations. Research shows that visual learning in math leads to deeper conceptual understanding.
All math tools on SmartOnlineGames are aligned with Common Core State Standards for Mathematics and are designed for students in grades K through 8. They are completely free, require no login or account creation, and work on any device including tablets, Chromebooks, and interactive whiteboards.
Interact with the visual tool above to explore the concept. Try different inputs and observe how the output changes. Teachers can use this tool for whole-class demonstrations or independent practice. Parents can use it for homework help or math enrichment at home.
Last reviewed: April 2026