160 Chapter 2 Fractions and Mixed Numbers: Multiplication and Division For Exercises 14 and 15, determine if the fractions are equivalent. Then fill in the blank with either = or . 14. 15. For Exercises 16 and 17, simplify the fractions to lowest terms. 16. 17. 18. Christine and Brad are putting their photographs in scrapbooks. Christine has placed 15 of her 25 photos and Brad has placed 16 of his 20 photos. a. What fractional part of the total photos has each person placed? b. Which person has a greater fractional part completed? For Exercises 19–26, multiply or divide as indicated. Simplify the fraction to lowest terms. 19. 20. 21. 22. 23. 24. 600 1200 50 65 13 15 2 18 9 25 40 6 105 42 5 28 24 21 8 a75 24 b 4 2 9 57 46 1,200,000 1,400,000 150 105 4 25 2 5 5 4 15 12 Z 25. 26. 27. Perform the order of operations. Simplify the fraction to lowest terms. 2 28. Find the area of the triangle. 29. Which is greater, or ? 30. How many “quarter-pounders” can be made from 12 lb of ground beef? 31. The Humane Society has 120 dogs. Of the 120, are female. Among the female dogs, are pure breeds. How many of the dogs are female and pure breeds? 32. A zoning requirement indicates that a house built on less than 1 acre of land may take up no more than one-half of the land. If Liz and George purchased a -acre lot of land, what is the maximum land area that they can use to build the house? 45 1 15 5 8 20 14 20 14 8 cm 11 cm 3 52 72 c a1 2 b 8 3 d 4 4 17 2 4 15 10 21 4 1 6 Chapters 1–2 Cumulative Review Exercises 1. Fill in the table with either the word name for the number or the number in standard form. For Exercises 2–13, perform the indicated operation. 2. 432 998 3. 572 433 4. 4122 52 5. 384 16 6. 23(81) 7. 3,000,000 40,000 8. 9. 48 8 474 1007 823 10. 11. 6 2 8 12. 52 32 13. (5 3)2 Height (ft) Standard Mountain Form Words Mt. Foraker Seventeen thousand, four (Alaska) hundred Mt. Kilimanjaro (Tanzania) 19,340 El Libertador Twenty-two thousand, (Argentina) forty-seven Mont Blanc (France-Italy) 15,771
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