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Home > History and Archaeology > History > Practical Short Methods in Rapid Calculation; Containing Many Short Ways of Handling Figures Never Before Published, Also, All the Best Short Methods Now in Common Use, a Number of Which Have Been Improved Upon
Practical Short Methods in Rapid Calculation; Containing Many Short Ways of Handling Figures Never Before Published, Also, All the Best Short Methods Now in Common Use, a Number of Which Have Been Improved Upon

Practical Short Methods in Rapid Calculation; Containing Many Short Ways of Handling Figures Never Before Published, Also, All the Best Short Methods Now in Common Use, a Number of Which Have Been Improved Upon


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About the Book

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1916 Excerpt: ...to three decimal places. 16745.65 True to four decimal places..4326.00015 Practice the following, figuring them mentally, according to the following illustration: Multiplying 23 by 8, the product is 184; retaining this in the mind, 45 is multiplied by 8 with 360 as product. This is added to 184, the 3 being placed under 4, and the result is 187.60. Xext, 23X18 = 414 or 4.14. Now, 45#X.18 cwt. =.0810 or 8c. This last amount should be included with 4.14, which would make 4.22 to be written beneath 187.60. The sum of these two numbers is the product. Cross multiplication uu1nber in the mind. very valuable to any who are not able to carry a large, -Examples with explanation: 8642 2 is multiplied by 8 and the 6 is written in the product and 1 38 is carried. Now 4 is multiplied by 8 and the 1 is added, and 2 is multiplied by 3 and the product is added to product of 4 and 8 328396 with the carrying figure; the sum of these numbers is 39. 9 is placed to the left of 6 in the product, and 3 is carried. 6 is multiplied by 8, making 48; 4 is multiplied by 3, making 12. 48, 12 and 3 are added, making 63; 3 is placed to left of 9 in product and 6 is carried. 8 is multiplied by 8 and 3 by 6 and their products and the 6 carried are added, making 88. 8 is placed to the left of 3 in product and 8 is carried. Now 8 is multiplied by 3, making 24, to which the 8 carried is added, making 32, which is written to the left of the 8, thus completing the product. 345 3X5 = 15; 5 is written in product and 1 is carried. 543 3X4 + (4X5) + 1 (carried) =33. 3 is written in product to the left of 5 and 3 is carried; 3X3 + (5X5) + (4X4)+3 = 53. 3 is written 187335 in product to left of 3 and 5 is carried. 3X4+ (4X5)+5 =37. 7 is placed in product to left of 3, and 3 is carried. 3X5+3 = 18, wh..


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Product Details
  • ISBN-13: 9781159653781
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 44
  • Spine Width: 2 mm
  • Width: 189 mm
  • ISBN-10: 115965378X
  • Publisher Date: 01 May 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 95 gr

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Practical Short Methods in Rapid Calculation; Containing Many Short Ways of Handling Figures Never Before Published, Also, All the Best Short Methods Now in Common Use, a Number of Which Have Been Improved Upon
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