4. TO divide a fraction by a fraction, invertthe divisor and proceed as in multiplication.5. The method of CANCELING can be usedto advantage before multiplying fractions (usingthe principle of rule No. 1) to avoid operationswith larger numbers.A decimal fraction is a fraction whosedenominator is 10 or some power of 10, such as100, 1,000, and so on. For example,are decimal fractions. Accordingly, they couldbe written as 0.7, 0.23 and 0.087 respec-tively. Decimal fractions have certain char-acteristics that make them easier to use incomputations than other fractions. Chapter 5of NAVEDTRA 10069-D1 deals entirely withdecimal fractions. A thorough understandingof decimals will be useful to the EngineeringAid in making various engineering compu-tations. Figure 1-1 shows decimal equivalentsof fractions commonly used by Builders,Steelworkers, Utilitiesmen, and other trades.Figure 1-1. Decimal equivalents.1-3
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