Section 2.1 Introduction to Fractions and Mixed Numbers 103 Concept 1: Definition of a Fraction 2. Write a fraction representing 2 parts of a whole unit divided into 7 parts of equal size. For Exercises 3–6, identify the numerator and the denominator for each fraction. (See Example 1.) 3. 4. 5. 6. For Exercises 7–14, write the fraction as a division problem and simplify, if possible. 7. 8. 9. 10. 11. 12. 13. 14. For Exercises 15–22, write a fraction that represents the shaded area. (See Example 2.) 15. 16. 17. 18. 19. 20. 21. 22. 0 1 11 0 0 1 2 0 0 7 0 3 8 8 2 2 9 1 6 1 1 2 12 11 8 9 2 3 24. Write a fraction that represents the portion of medicine left in the bottle. 25. The scoreboard for a recent men’s championship swim meet in Melbourne,Australia, shows the final standings in the men’s 100-m freestyle event.What portion of the finalists are from the USA? (See Example 3.) 26. Refer to the scoreboard from Exercise 25.What portion of the finalists are from the Republic of South Africa (RSA)? 27. The graph categorizes a sample of people by blood type.What portion of the sample represents people with type O blood? 28. Refer to the graph from Exercise 27.What portion of the sample represents people with type A blood? Name Country Time Maginni, Filippo ITA 48.43 Hayden, Brent CAN 48.43 Sullivan, Eamon AUS 48.47 Cielo Filho, Cesar BRA 48.51 Lezak, Jason USA 48.52 Van Den Hoogenband, Pieter NED 48.63 Schoeman, Roland Mark RSA 48.72 Neethling, Ryk RSA 48.81 Sample by Blood Type Type O 41 Type A 43 Type AB Type B 7 12 23. Write a fraction to represent the portion of F gas in a gas tank 1 represented by the 2 gauge. E
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