Lakeshore Subtraction Machine

The Lakeshore Subtraction Machine makes subtraction equation fun and memorable for kids. Children just need to press on any of the 81-equation button on the Subtraction Machine and the answer to that equation is revealed. The equation buttons are securely held in a durable plastic frame that measures 8.5 x 9.5 inches. A go to tool for learning subtraction. Portable and easy to use and understand. The equation button pops up easily with little push. Recommended for 5+ years or children that need early introduction.