Details and Image
|Date||Scale Length||Area of Use
|Linear||Smarty Cat||Smarty Cat||USA||Plastic||25 cm||Times Tables & Addition
Notes: "Smarty Cat: And, you think you know slide rules? You think slide rules multiply numbers, but the user must track decimals? Well, one side of this Smarty Cat multiplies numbers, but only integers between 2 and 9. And the other side adds numbers, but only integers between 2 and 6."