13.4. Weight _ 62 = _. Unlock the Problem. Math Talk. Essential Question. Name. Module

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1 ? Name 13.4 Essential Question Weight How can you compare and convert customary units of weight? Geometry and Measurement 5.7. MTHEMTIL PROESSES 5.1., 5.1.E Unlock the Problem Hector s school is having a model rocket competition. To qualify, each rocket must weigh 4 pounds or less. Hector s unpainted rocket weighs 62 ounces. What is the weight of the most paint he can use for his model rocket to qualify for entry? What weight does Hector need to convert? fter Hector converts the weight, what does he need to do next? 1 pound = _ ounces Use a strip diagram to write an equation. STEP 1 onvert 4 pounds to ounces. MOEL REOR total lb oz in 1 lb total oz _ _ STEP 2 Subtract the rocket s weight from the total ounces a rocket can weigh to qualify. _ 62 = _ Houghton Mifflin Harcourt Publishing ompany So, the weight of the paint can be at most _ ounces for Hector s model rocket to qualify for entry. Math Talk Mathematical Processes How did you choose which operation to use to change from pounds to ounces? Explain. Module

2 Example The rocket boosters for a U.S. space shuttle weigh 1,292,000 pounds each when the shuttle is launched. How many tons does each rocket booster weigh? Use mental math to convert pounds to tons. STEP 1 ecide which operation to use. Since pounds are smaller than tons, I need to the number of pounds by. Units of Weight 1 pound (lb) = 16 ounces (oz) 1 ton (T) = 2,000 lb STEP 2 reak 2,000 into two factors that are easy to divide by mentally. 2,000 = 2 STEP 3 ivide 1,292,000 by the first factor. Then divide the quotient by the second factor. 1,292,000 = 2 = So, each rocket booster weighs tons when launched. Share and Show 1. Use the picture to complete each equation. a. 1 pound = _ ounces b. 2 pounds = _ ounces c. 3 pounds = _ ounces d. 4 pounds = _ ounces e. 5 pounds = _ ounces onvert lb = _ oz 3. 3 T = _ lb oz = _ lb 486 Math Talk Mathematical Processes Explain how you can compare 11 pounds to 175 ounces mentally. Houghton Mifflin Harcourt Publishing ompany Image redits: orbis

3 Name Problem Solving Practice: opy and Solve onvert lb = oz 6. 6 T = lb oz = lb T = lb oz = lb lb = oz Use Symbols ompare. Write <, >, or = oz 8 lb T 32,000 lb lb 229 oz 14. Write Math Explain how you can use mental math to compare 7 pounds to 120 ounces. Write Math Show Your Work Problem Solving 15. Multi-Step Kia wants to have 4 pounds of munchies for her party. She has 36 ounces of popcorn and wants the rest to be pretzel sticks. How many ounces of pretzel sticks does she need to buy? Houghton Mifflin Harcourt Publishing ompany 16. Multi-Step Kevin uses 36 ounces of dried apples and 18 ounces of dried cranberries to make a fruit snack. He plans to sell the snack in 1_ 2 -pound containers. How may containers will he fill? Will any fruit snack be left over? Module 13 Lesson 4 487

4 aily ssessment Task Mathematical Processes Fill in the bubble completely to show your answer. 17. n elephant s brain weighs around 11 pounds, while a human s brain weighs about 48 ounces. How many more ounces does an elephant s brain weigh than a human s brain? 37 ounces 128 ounces 4 ounces 592 ounces 18. Use Symbols Which of the following inequalities is correct? 63 ounces > 4 pounds 40 pounds < 600 ounces 3.5 tons > 5,000 pounds 200 pounds < 3,000 ounces 19. Multi-Step 9-pound block of butter is delivered each morning to a restaurant. recipe for 1 pot of soup calls for 6 ounces of butter. Using all of the butter, how many pots of soup can the restaurant make each day? 24 pots of soup 18 pots of soup 11 pots of soup 4 pots of soup TEXS Test Prep arlos used 32 ounces of walnuts in a muffin recipe. How many pounds of walnuts did arlos use? 8 pounds 2 pounds 4 pounds 1 pound Houghton Mifflin Harcourt Publishing ompany

5 Homework and Practice Name Geometry and Measurement 5.7. MTHEMTIL PROESSES 5.1., 5.1.E 13.4 Weight onvert oz = lb 2. 5 T = lb lb = oz T = lb oz = lb lb = oz ompare. Write <, >, or = oz 9 lb 8. 7 T 15,000 lb oz 13 lb lb 365 oz T 40,000 lb lb 298 oz 13. Explain how you can use mental math to compare 175 ounces to 11 pounds. Problem Solving Houghton Mifflin Harcourt Publishing ompany 14. Peanuts in bulk bins at the grocery store cost $0.30 per ounce. How much would 2 pounds of peanuts cost? 15. Pecans in bulk bins at the grocery store cost $0.65 per ounce. How much would you spend if you bought 1 pound 8 ounces of peanuts and 2 pounds of pecans? Module 13 Lesson 4 489

6 Lesson heck TEXS Test Prep Fill in the bubble completely to show your answer. 16. Greg s cocker spaniel weighs 32 pounds. His kitten weighs 15 ounces. How many more ounces does the cocker spaniel weigh than the kitten? 256 ounces 241 ounces 497 ounces 512 ounces 17. The snack machine at the ball park contains 48 ounces of potato chips. How many pounds of chips are in the snack machine? 4 pounds 2 pounds 6 pounds 3 pounds 18. bag of corn chips weighs 8 ounces. How many bags of chips weigh 12 pounds? Which expression could be used to convert 86,000 pounds to tons? 86,000 1,000 86,000 1,000 86,000 2,000 86,000 2, Which of the following inequalities is correct? 12.5 pounds > 200 ounces 490 ounces > 30 pounds 6 tons < 10,000 pounds 8,000 pounds < 4 tons 21. car weighs 2 tons. How many ounces equal 2 tons? 64,000 4,000 32,000 6, Multi-Step Eight baseballs weigh 40 ounces. How many pounds do 16 baseballs weigh? pounds 4 pounds 20 pounds 80 pounds 23. Multi-Step football weighs 14 ounces. carton of footballs weighs 7 pounds. How many footballs are in a carton? Houghton Mifflin Harcourt Publishing ompany