168 Chapter 3 Fractions and Mixed Numbers: Addition and Subtraction For Exercises 11–22, add the like fractions. Write the answer as a fraction in lowest terms or as a whole number. (See Example 1.) 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. Bethany pours cup of bleach into a container and then adds cups of water. How many cups of bleach and water mixture does she have? 7 6 24. Austin rode his bike mi before he got a flat tire. He then had to walk another mi. How far did Austin travel? 16 9 4 1 4 7 18 22 18 10 18 18 14 11 14 6 14 5 8 4 8 9 8 3 20 8 20 15 20 3 2 5 2 2 9 4 9 1 8 3 8 1 4 3 4 3 10 4 10 6 5 3 5 5 3 2 3 6 11 7 11 For Exercises 25–28, subtract the like units. 25. 15 baskets 4 baskets 26. 52 cards 13 cards 27. 7 fifths 1 fifth 28. 18 tenths 11 tenths For Exercises 29 and 30, shade in the portion of the third figure that represents the subtraction of the first two figures. 29. 30. For Exercises 31–42, subtract the like fractions. Write the answer as a fraction or whole number. (See Example 2.) 31. 32. 33. 34. 35. 36. 37. 38. 39. 40. 41. 42. 43. A chemist has gram (g) of NaCl (salt). If he uses g, how much is left? 44. Jason bought acres of land and then sold acre. How much land does he have left? 34 11 4 3 8 5 8 31 40 14 40 12 40 10 16 1 16 5 16 34 15 6 15 3 15 28 25 14 25 4 25 13 6 5 6 23 12 15 12 13 10 3 10 13 3 7 3 10 4 5 4 9 2 6 2 7 9 6 9 9 8 6 8
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