| 摘要 |
The kit comprises a wheel (2) including 81 plates (16) representing solutions of multiplication, 9 hooks (12) linked with bars (14), another wheel (18) including 9 plates (19) representing multiplier of 1 to 9, and 9 buttons (21) representing multiplicants of 1 to 9. Once the multiplier is selected by rotation of the wheel (18) and the corresponding multiplicant by pressing the button (21), the solution plate (16) shows correct answer by rotation of the wheel (2) which is operated by the hook (12) and bar (14).
|
