ISBN-13: 9780198852650 / Angielski / Twarda / 2021 / 192 str.
ISBN-13: 9780198852650 / Angielski / Twarda / 2021 / 192 str.
How fast can you calculate? Would you like to be faster? This book presents the time honored tricks and tips of calculation, from a fresh perspective, to boost the speed at which you can add - whether a couple of numbers, or columns so long an accountant may faint. Find out how to subtract, multiply, divide, and find square roots more quickly.