Place Value Twizt’r

se this device in a variety of ways to perform many different arithmetic operations. There are four labeled cups and one arrow cup in the set. Color-coded printing on the cups provides students with a visual representation of place value (thousands, hundreds, tens, and ones). The + and - signs are used for simple calculations. Clockwise direction represents addition while counter-clockwise direction represents subtraction. Users can select the number of cups for different grade levels.