Bill S. Lee

Word Problems-detailed Explanations of Reasoning and Solving Strategies: Volume 12 Workbook Bill S. Lee 第1 版

This is the workbook of the twelfth volume of the entire set of 12 volumes of word problems solving strategies. If you want to set a solid foundation in math, grasping the techniques on solving word problems is the key to it. This set of books teaches you the techniques and strategies you will need to solve word problems. Sample question in this volume: Peter has read 120 pages of a book that he has just borrowed from the library. If the number of pages he has read is 2/5 less than the number of pages he has not read yet, how many pages does the book have? Reasoning and solution: From ?the number of pages he has read is 2/5 less than the number of pages he has not read yet?, we know that the number of pages he has not read yet ( the noun phrase after the word ?than?) is the amount in 1 whole and the number of pages he has read is in a fractional part that is 25 less than the fractional part the number of pages he has not read yet is in, 1, so the number of pages he has read is in a fractional part that is 2/5 less than 1 or is (1-2/5 ) or is 3/5 of 1 whole. He has read 120 pages so we divide 3/5 into the amount in it, 120, to find the amount in 1 whole, the number of pages he has not read yet: 120÷3/5 =120 x 5/3 =200 pages The number of pages that he has not read is 200 pages. ... The techniques and strategies on using algebraic equations to solve word problems and on solving proportions, surface area, volume and area of lateral surface of cylinders and cones are also reviewed in the book. This book also reviews on using one set of 3 elements formulas and 2 sets of 3 elements formulas to solve whole number word problems, decimal word problems and fraction word problems. Detailed explanations of the reasoning and solving strategies for each and every problem are given in the answer key.