By Robert D. Smith, John Peterson

Introductory Technical arithmetic, fifth variation presents present and functional vocational and technical math functions for today's refined alternate and technical paintings environments. every one unit can provide useful math options along step by step examples and difficulties drawn from a variety of occupations. The considerable examples and challenge units emphasize on-the-job purposes of math. improvements to the 5th variation comprise more advantageous algebra assurance, a brand new part on uncomplicated statistics, new fabric on conversions from metric to wide-spread structures of degree, and a bit that vitamins the fundamentals of operating with spreadsheets for graphing.

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**Extra resources for Introductory Technical Mathematics**

**Sample text**

Multiplication by 1 does not change the value. The 1 used is in the form of a fraction that has an equal numerator and denominator. The value of a fraction is not changed by multiplying both the numerator and denominator by the same number. EXAMPLES • 3 as thirty-seconds. 8 Determine what number the original denominator is multiplied by to get the desired denominator. (32 Ϭ 8 ϭ 4) Multiply the numerator and denominator by 4. 1. Express 2. 3 ? ϭ 4 64 64 Ϭ 4 ϭ 16 3 16 48 Ans ϫ ϭ 4 16 64 3. 3 ? ϭ 8 32 3 4 12 ϫ ϭ Ans 8 4 32 2 ?

What fractional part of the total area of the parcel of land is represented by each of the 5 lots? Express answers in lowest terms. LOT #2 AREA = 19,750 SQ FT LOT #3 AREA = 14,500 SQ FT LOT #4 AREA = 17,875 SQ FT LOT #5 AREA = 16,625 SQ FT LOT #1 AREA = 15,000 SQ FT Figure 2–7 5. A retail television and appliance ﬁrm has a 3-day sale on television sets. The table shown in Figure 2–8 lists daily sales for each of 3 types of sets. What fractional part of the total 3-day sales does each day’s sales represent?

12 807 liters 9 858 liters 4,464 acres 1,937 acres 5,555 days Figure 1–1 Solve and check. The addition in parentheses is done ﬁrst. 17. 18. 19. 20. 21. 1–6 87 Ϫ (35 ϩ 19) ϭ 33 Ans 908 Ϫ (312 ϩ 6 ϩ 88) 3,987 Ϫ (616 ϩ 17 ϩ 1,306) (32 ϩ 63 ϩ 9) Ϫ 22 (503 ϩ 7,877 ϩ 6) Ϫ 2,033 Problem Solving—Word Problem Practical Applications It is important that you have the ability to solve problems that are given as statements, commonly called word problems. ” UNIT 1 • Whole Numbers 9 Often the relevant facts of the problem are written down and analyzed.