| Measure | Value |
|---|
Problems are randomly generated with rounded teaching values. The worked solution builds step by step below the picture.
Your job
Drag a card onto a box, or tap a card and then tap the box's name. Cards are buttons, so Tab and Enter work too.
Rounded values from published records where stated; other numbers are teaching data shaped like the real pattern.
Wrong picks are fine here. Each one tells you why.