{"product_id":"9780486202952","title":"How to Calculate Quickly: Full Course in Speed Arithmetic","description":"\u003cp\u003eDo you want to double or triple the speed with which you calculate? \u003ci\u003eHow to Calculate Quickly \u003c\/i\u003eis a tried and true method for helping you in the mathematics of daily life — addition, subtraction, multiplication, division, and fractions.\u003cbr\u003eThe author can awaken for you a faculty which is surprisingly dormant in accountants, engineers, scientists, businesspeople, and others who work with figures. This is \"number sense\" — or the ability to recognize relations between numbers considered as whole quantities. Lack of this number sense makes it entirely possible for a scientist to be proficient in higher mathematics, but to bog down in the arithmetic of everyday life.\u003cbr\u003eThis book teaches the necessary mathematical techniques that schools neglect to teach: Horizontal addition, left to right multiplication and division, etc. You will learn a method of multiplication so rapid that you'll be able to do products in not much more time than it would take to write the problem down on paper.\u003cbr\u003eThis is not a collection of tricks that work in only a very few special cases, but a serious, capably planned course of basic mathematics for self-instruction. It contains over 9,000 short problems and their solutions for you to work during spare moments. Five or ten minutes spent daily on this book will, within ten weeks, give you a number sense that will double or triple your calculation speed.\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e","brand":"Dover Publications","offers":[{"title":"Default Title","offer_id":47025972838640,"sku":"9780486202952","price":6.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0737\/7593\/9824\/files\/9780486202952_p0.jpg?v=1763708848","url":"https:\/\/shop-qa.barnesandnoble.com\/products\/9780486202952","provider":"Barnes \u0026 Noble (DEV)","version":"1.0","type":"link"}