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Name 1 Algebra • Use Equations to Represent Problems LESSON 26 2.4.A, 2.4.C OBJECTIVE Write equations to represent and solve a variety of addition and subtraction situations. Some red fish and 9 green fish are in a tank. The tank has 14 fish. How many red fish are there? ? 9 14 Write a number sentence. Use a ■ for the missing number. 14 - 9 = ■ © Houghton Mifflin Harcourt Publishing Company 5 red fish in the tank Write a number sentence for the problem. for the missing number. Then solve. Use a ■ 1. There are 13 trees in a park. 8 are pine trees. The rest are oak trees. How many oak trees are there? oak trees Number and Operations ? 8 So, there are 13 51 Name 1 2.4.A, 2.4.C Algebra • Use Equations to Represent Problems Write a number sentence for the problem. Use a for the missing number. Then solve. ■ 1. There were 15 apples in a bowl. Dan used some apples to make a pie. Now there are 7 apples in the bowl. How many apples did Dan use? apples 2. Amy has 16 gift bags. She fills 8 gift bags with whistles. How many gift bags are not filled with whistles? gift bags 3. There were 5 dogs at the park. Then 9 more dogs joined them. How many dogs are at the park now? © Houghton Mifflin Harcourt Publishing Company dogs Problem Solving Write or draw to show how you solved the problem. 4. Tony has 7 blue cubes and 6 red cubes. How many cubes does he have in all? cubes 52 Lesson 26