By Robert Chasan
You can now mix a powerful, functional method of arithmetic with the most recent methods, applied sciences, and practices in modern day welding with sensible difficulties IN arithmetic FOR WELDERS, 6E. Readers basically see how welders depend on mathematical abilities to resolve either daily and tougher difficulties, from measuring fabrics for slicing and assembling to successfully and economically ordering fabrics. hugely readable causes, a number of real-world examples, and perform difficulties emphasize math talents most crucial in welding this day, from uncomplicated tactics to extra complicated math formulation and applied sciences. Readers depart outfitted with the powerful math instruments they want for fulfillment in state-of-the-art welding careers.
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Extra resources for Practical Problems in Math. For Welders
Sample text
We now have a total of 6⁄ 4. The result is 26⁄ 4 Continue with subtraction. 22 3 4 + −1 4 → 4 26 3 4 3 3 → −1 4 4 2 6 4 −1 3 4 1 3 4 Remember, we only need to borrow 1 whole number, and the number can be converted into any fraction needed. For example,1 = 8⁄ 8, 1 = 16⁄ 16, 1 = 3⁄ 3, 1 = 4⁄ 4, 1 = 32⁄ 32, and so on. PRACTICAL PROBLEMS 1. Determine the missing dimension on this welded bracket. qxd 36 2. SECTION 2 1/23/08 11:36 AM Page 36 COMMON FRACTIONS A 31⁄ 16″ piece is cut from the steel angle iron illustrated.
Express as decimal fractions. a. twelve hundredths a. b. seventy-eight hundredths b. c. four tenths c. d. nine tenths d. e. six-hundred twenty-seven thousandths e. 047 gallons. Round to the nearest hundredth of a gallon.
Qxd 1/23/08 11:36 AM Page 33 Unit 7 ADDITION OF COMMON FRACTIONS 8. To make use of some scrap, four pieces of 11⁄ 2″ cold-rolled bar are welded together. What is the total length of the completed weldment? 9. What is the length of the weldment if pieces A and B are welded together? qxd 1/23/08 11:36 AM Page 34 Unit 8 SUBTRACTION OF COMMON FRACTIONS BASIC PRINCIPLES Sometimes measurements not on the blueprint are needed, and it may be necessary to subtract one fractional measurement from another to obtain the correct length of the materials.