{"product_id":"9780486202952","title":"How to Calculate Quickly : Full Course in Speed Arithmetic by Henry Sticker","description":"Many useful procedures explained and taught: 2-column addition, left-to-right subtraction, direct multiplication by numbers greater than 12, mental division of large numbers, more. Also numerous helpful shortcuts. More than 8,000 problems, with solutions. 1945 edition.\u003cbr\u003eBinding: Paperback \/ softback","brand":"Gardners","offers":[{"title":"Default Title","offer_id":56290204909941,"sku":"9780486202952","price":8.49,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/7193\/3106\/files\/9780486202952.jpg?v=1762729909","url":"https:\/\/backstory.london\/products\/9780486202952","provider":"Backstory","version":"1.0","type":"link"}