Section 3.1 Addition and Subtraction of Like Fractions 167 Applying Addition and Subtraction of Fractions Example 5 Pam mixed gal of water with gal of liquid fertilizer. Then she used gal of the mixture to fertilize her blueberry bushes. How much mixture was left over? Solution: The net amount of liquid remaining is given by Amount Pam started with Amount Pam used 12 1 7 6 3 16 8 3 8 There was gal of mixture left over. 38 16 12 16 1 16 7 16 7 16 1 16 12 16 5 Answer 10. or 1 gal 1 8 9 8 Study Skills Exercise How can you use the Concept Connections and Skill Practice exercises in the margins of this text? Vocabulary and Key Concepts 1. Two fractions are _________ fractions if they have the same denominator. Concept 1: Addition and Subtraction of Like Fractions For Exercises 2–7, add the like units. 2. 9 cm 11 cm 3. 3 ft 5 ft 4. 7 chairs 2 chairs 5. 7 m 13 m 6. 8 thirds 2 thirds 7. 1 fourth 6 fourths For Exercises 8 and 9, shade in the portion of the third figure that represents the addition of the first two figures. 8. 9. 10. Explain the difference between evaluating the two expressions and 25 75 75 . 25 ⎫⎪⎬⎪⎭ Skill Practice 10. Jamie mixed gal of green paint with gal of white paint. Then she used gal of the mixture to paint a mural. How much paint is left over? 38 7 8 5 8 Section 3.1 Practice Exercises
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