"Secrets of mental math, the mathemagicians guide to lighting calculations and amazing math tricks"
Benjamin, Arthur
"Secrets of mental math, the mathemagicians guide to lighting calculations and amazing math tricks" - New York Three River Press 2006 - 278
Magic tricks in math education
Mental arithmetic - Study and teaching
Mental calculators
510 B438s
"Secrets of mental math, the mathemagicians guide to lighting calculations and amazing math tricks" - New York Three River Press 2006 - 278
Magic tricks in math education
Mental arithmetic - Study and teaching
Mental calculators
510 B438s