Hundred square
Click squares to colour them. Highlight multiples with one press. Hide numbers and ask what goes where.
How to use it
- Pick a colour, click squares. Type a number and press Highlight to colour all its multiples at once. Use a second colour for a second table and see where they overlap.
- "Hide 20 at random" blanks twenty squares; click a blank square to peek at it and again to hide it. "Hide numbers" blanks the lot.
- Start at 0 for a 0 to 99 square, or go up to 120 for the classes that need to see past 100.