Mathematics for machine technology by Robert Donald Smith

By Robert Donald Smith

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Change the division operation to a multiplication operation. 1 ~+1=~ 8 4 x~=3 ~6 Ans 2 Follow the procedure for multiplication. mII ¥ The machine bolt shown has a pitch of /6'" The pitch is the distance between 2 adjacent threads or the thickness of one thread. ". All dimensions are in inches. 8 . D d 7 ...!.. IVI e "8 by 16 . M' T = 14 1 1rPITCH 1~ Ans IIIIJ ~~~ 19 20 SECTION1 CommonFractions,DecimalFractions,and Percentage Dividing Mix~d Numbers ~ To divide mixed numbers . Expressthemixednumbersas improperfractions.

II 4 10 b. 737 II 64 241. 4 c. 22. II 16 6! 2 d. II 2 15 e. g"10 1215 Lead H-PITCH SINGLE . Afterstudyingthis unityou should be ableto Solve problems which involve combined operations of fractions and mixed numbers. SQlvecomplex fractions. Before a part is machined, the sequence of machining operations, the machine setup, and the working dimensions needed to produce the part must be determined. In actual practi,ce, calculations of machine setup and working dimensions require not only the individual operations of addition, subtraction, multiplication, and division, but a combination of two or more of these operations.

The denominator is 100,000. 03125 = 3125 - J.... 100,000 - 32 Ans to lowest terms. APPLICATION Rounding Decimal Fractions Round the following decimals to the indicatednumber of decimal places. 1. 63165 (3 places) 4. 01723 (3 places) 2. 1247 (2 places) 5. 03894(2places) 3. 23975 (3 places) 6. 90039 (2 places) UNIT9 RoundingDecimalFractionsand EquivalentDecimaland CommonFractions 7. 72008 (4 places) 9. 0003 (3 places) 8. 0006 (3 places) 10. 099 (3 places) Express Common Fractions as Decimal Fractions Express the common fractions as decimal fractions.

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