Base-Ten Subtraction
Tap a block to cancel it. Drag a block into the workspace to break apart a ten or combine ones.
52 − 27 = ?
Start with 52
Tap to cancel ✕Workspace
0 in workspaceNeed more ones? Drag a ten down, break it apart, then tap a block to send it back up. Keyboard: focus a block and press the Down or Up arrow to move it.
1 10 100