Clear instructions for 101 tricks and problems, many based on important math principles. Calculations have been concealed; tricks are carefully streamlined for quick understanding and flawless performance. Master such number phenomena as Lightning Calculations, Giant Memory, Magic Squares, nearly 100 more. 98 illustrations.
|Availability||Usually ships in 24 to 48 hours|
|Grade level||5 and Up (ages 10 and up)|
|Dimensions||5 3/8 x 8 1/2|