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3 reviews
rofi_494107 May, 2022
Should be called REAL MATH.
I've always been dismal at math, but interested none the less. A few pages into this book I was multiplying huge numbers by 12 in seconds! This method should be taught in all elementary schools. Did I mention it's also fun?Read full review
Verified purchase: Yes • Condition: pre-owned • Sold by: worldofbooksusa
msbeautiful02 Sep, 2017
Excellent mathematical bool
I graduated from math and physics school, have a long professional mathematical experience and i never seen before such a comprehensive speed calculation book. It is a genius interpretation of number theoryRead full review
Verified purchase: Yes • Condition: pre-owned • Sold by: second.sale
phimo_595909 Jul, 2023
Recomend for public schools
Trachtenberg has aways been five star
Verified purchase: Yes • Condition: pre-owned • Sold by: zbkinternational