Ten frames
Click a cell to put a counter in it, click again to take it out. Two colours for number bonds. A flash button for subitising.
How to use it
- Click cells to add counters. Switch to blue for the second part of a number bond; the readout shows 6 + 4 = 10.
- Type a number and press Fill to fill from the left, or Flash it to show that many counters scattered for a second and a half, then hide them. Click the readout to bring them back.
- Two frames for numbers to 20.