“This book is a delight—a must read for anyone who wants to love numbers and understand why.”──裘.波勤(Jo Boaler),《大腦解鎖》作者
“Tanya shares brilliant mental math tricks that help you perform a wide range of calculations in your head, but she doesn’t stop there. She explains why the tricks work, so you actually learn what you’re doing and why you’re doing it!”──Rob Cozzens, creator of Math Antics
“Tanya teaches mathematics effortlessly and with such enthusiasm. If you’ve ever struggled with math, this is the book for you!”──Presh Talwalkar, creator of Mind Your Decisions