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Lesson Menu Five-Minute Check (over Lesson 5–4) Main Idea Example 1:Problem-Solving Investigation

Main Idea/Vocabulary I will choose the best strategy to solve a problem.

Example 1 STEPHANIE: I had a lemonade stand. I sold large cups of lemonade for $0.65 and small cups of lemonade for $0.40. After one hour, I earned $6.15. How many of each size did I sell? YOUR MISSION: Find the number of each size sold.

Example 1 Understand What facts do you know? You know that Stephanie earned $6.15. She sold large cups for $0.65. She sold small cups for $0.40. What do you need to find? You need to know how many of each size Stephanie sold.

Example 1 Plan You need to think about the different combinations of large and small cups she could have sold. So, the guess and check strategy is a good choice.

Example 1 Solve Use a calculator. Since 10 × $0.65 = $6.50, less than 10 large cups were sold. Let’s try 8. Too much. Too little. 1 st guess 2 nd guess 3 rd guess $5.20 $3.90 $ $1.20 $2.00 $1.60 $6.40 $5.90 $6.15 Answer: So, Stephanie sold 7 large cups and 4 small cups of lemonade.

Example 1 Check Look back at the problem. Since 7 × $0.65 = $4.55 and 4 × $0.40 = $1.60, Stephanie made $ $1.60 or $6.15. So, the answer is correct.

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Resources Five-Minute Check (over Lesson 5–4) Image Bank Math Tool Chest Multiplication Expressions

1.A 2.B 3.C 4.D Five Minute Check 1 (over Lesson 5–4) A. d ÷ 5 Write an expression for a fifth of d. B. 5d C. 5 ÷ d D. 5 + d

1.A 2.B 3.C 4.D Five Minute Check 2 (over Lesson 5–4) C. 3f A. 3 ÷ f Write an expression for the product of f and 3. B. 3 – f D. 3 + f

1.A 2.B 3.C 4.D Five Minute Check 3 (over Lesson 5–4) D. r – 10 A. 10 – r Write an expression for 10 less than r. B. 10r C. 10 ÷ r

1.A 2.B 3.C 4.D Five Minute Check 4 (over Lesson 5–4) C. 11 A. 9 Evaluate n + 7 if n = 4. B. 10 D. 12

1.A 2.B 3.C 4.D Five Minute Check 5 (over Lesson 5–4) B. 5 C. 6 A. 4 Evaluate 9 – n if n = 4. D. 7

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