| 摘要 |
<p>A computational aid, especially for teaching children calculations in a visual way, comprises a visual display area (6,7,8,11) and key-actuated means (10) to display on the visual display area information concerning any selected calculation in at least one non-digital representational mode. By demonstrating the same calculation with different visual concrete representational modes, e.g. counting blocks, number lines and finger counting, as well as with number symbols, the user can see the connection between number symbols and realistic situations. The device is preferably utilisable in three modes; a demonstration mode, a game mode and a tool mode in which minimal mental effort is required to obtain a numerical answer.</p> |
