Mental Calculation


The Trachtenberg Speed System of Basic Mathematics
Secrets of Mental Math: The Mathemagician's Guide to Lightning Calculation and Amazing Math Tricks
Blank 133x176
Calculator's Cunning
 
by
Karl A. Menninger
Math Magic: The Human Calculator Shows How to Master Everyday Math Problems in Seconds
Becoming a Mental Math Wizard
The Great Mental Calculators: The Psychology, Methods, and Lives of Calculating Prodigies Past and Present
How to Calculate Quickly: Full Course in Speed Arithmetic (Dover Books on Mathematics)
Dead Reckoning: Calculating Without Instruments
Short-Cut Math