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🔍 Expanded Notation Tool

LI: write numbers in expanded notation SC: show the value of each digit, e.g. 352 = 300 + 50 + 2
TIB: it shows how a number is made up of its parts
Click and drag a digit downward to reveal what it's really worth.
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About this tool

The Expanded Notation Tool shows what each digit in a number is really worth. Students drag a digit down out of the number and watch zeros appear one by one as it grows into its full value, building the expanded notation (e.g. 4000 + 300 + 50 + 2) piece by piece.

Best for: Years 2 to 5

How to use it

  1. Choose how many digits to work with, or press New number.
  2. Drag a digit down slowly to watch its zeros appear, or tap it to reveal its value instantly.
  3. Reveal every digit to build the full expanded notation.
  4. Tap a revealed value to send it back up into the number.

Teaching tips