Place Value Lab
Grade 4Every digit in a six-digit number is a world of its own — a speck of stardust in the Ones place, a blazing supernova in the Hundred Thousands. Dial the console, switch numeral systems, and watch one number wear two different names.
Place Value Lab
Tap a number to see its place value. Use the arrows to change the number.
Written in Words
Number Detective
Tap any digit above to see what it's really worth — and what it looks like out here.
The digit 0
sits in the Ones place.
Equation: 0 × 1
Sky Chart Each body = 1
Expanded Form
Number Challenge
Match the number with its correct reading. Look carefully at each digit!
Start the challenge, then use the arrows to build the exact number.
Quick Math Quiz
Answer quick questions about place value and numbers.