Math · AreaVISUAL DISCOVERY 12 OF 1,100
Rows Build a Rectangle
Starter · about 6 minutes · a little curiosity goes a long way
For grown-ups
Today’s little discovery
Each row contains width unit squares, and there are height rows. Multiplication counts the whole array once: area = width × height.
Ask what one row contributes before multiplying.
This is a learning model. Try the take-home activity together.Voice settings
Using Heart (en-US).
Your selected voice and opening narration get ready when the page opens with Sound on. The first visit downloads a voice model (about 92 MB), which your browser can cache. No lesson text is sent to a speech service.The sample plays once and does not change the Sound on/off setting.- Wonder
- Guess
- Try it
- Discover
- Celebrate
HERE’S A LITTLE WONDER…
Why does width times height count every square once?
A floor installer lays equal square tiles in tidy rows.
No rush. Try an idea and see.