15.3. Customary Units of Weight. Activity. Unlock the Problem. Materials color pencils. Math Talk. Essential Question. Name

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1 ? Name 15.3 Essential Question ustomary Units of Weight How can you convert customary units of weight? Geometry and Measurement 4.8., 4.8. lso 4.8. MTHEMTIL PROESSES 4.1., 4.1.F, 4.1.G Unlock the Problem Ounces and pounds are customary units of weight. How does the size of a pound compare to the size of an ounce? ctivity Materials color pencils The number line below shows the relationship between pounds and ounces. Pounds 0 1 Ounces STEP 1 Use a color pencil to shade 1 pound on the number line. STEP 2 Use a different color pencil to shade 1 ounce on the number line. STEP 3 ompare the size of 1 pound to the size of 1 ounce. You can use a spring scale to measure weight. You need _ ounces to make _ pound. So, 1 pound is _ times as heavy as 1 ounce. Explain how the number line helped you to compare the sizes of the units. Math Talk Mathematical Processes Which is greater, 9 pounds or 9 ounces? Explain. Houghton Mifflin Harcourt Publishing ompany Module

2 Example 1 onvert larger units to smaller units. Nancy needs 5 pounds of flour to bake pies for a festival. How many ounces of flour does Nancy need to bake the pies? STEP 1 Make a table that relates pounds and ounces. Pounds Ounces Think: 1 pound 16 = 16 ounces 2 pounds 16 = 3 pounds _= 4 pounds _= 5 pounds _= So, Nancy needs _ ounces of flour. Example 2 onvert smaller units to larger units. Marcel buys 144 ounces of sugar at the grocery store. How many pounds of sugar did Marcel buy? Ounces Pounds ounces 16 = 5 pounds 96 ounces 16 = 112 ounces 16 = 128 ounces _ = 144 ounces _ = So, Marcel bought _ pounds of sugar. Try This! There are 2,000 pounds in 1 ton. Make a table that relates tons and pounds. 1 ton is times as heavy as 1 pound. 532 Tons Pounds 1 2, Houghton Mifflin Harcourt Publishing ompany

3 Name Share and Show 1. 4 tons = pounds Think: 4 tons = omplete. ustomary Units of Weight 1 pound (lb) = 16 ounces (oz) 1 ton (T) = 2,000 pounds 2. 5 tons = pounds 3. 6 pounds = ounces ounces = pounds ounces = pounds Problem Solving 6. landscaping company ordered 8 tons of gravel. They sell the gravel in 50 pound bags. How many pounds of gravel did the company order? Math Talk Mathematical Processes What equation can you use to solve Exercise 3? Explain. 7. ommunicate If you could draw a number line that shows the relationship between tons and pounds, what would it look like? Explain. Write Math Show Your Work 8. Multi-Step Keith bought 4 steaks from the store. One steak was 14 ounces, one steak was 12 ounces, one steak was 8 ounces and the last steak was 14 ounces. How many pounds of steak did Keith buy from the grocery store? Explain. Houghton Mifflin Harcourt Publishing ompany Module 15 Lesson 3 533

4 aily ssessment Task Mathematical Processes Fill in the bubble completely to show your answer. 9. Jill needs 4 pounds of peanut butter to make peanut butter and jelly sandwiches for a party. She buys peanut butter in jars. The weight of peanut butter in jars is given in ounces. How many ounces of peanut butter does Jill need to make the sandwiches? 4 ounces 16 ounces 8 ounces 64 ounces 10. The vet tells Jan that her puppy weighs 5 pounds. The scale shows the puppy s weight in ounces. What weight does the scale show? 5 ounces 16 ounces 80 ounces 60 ounces 11. Multi-Step truck is transporting 4 new cars to a car dealership. Each car weighs 2 tons. The weight limit for trucks going over bridges is given in pounds. What is the weight of the cars in pounds? 16 pounds 16,000 pounds 8,000 pounds 24,000 pounds TEXS Test Prep 12. Mike is recording his baby sister s weight in pounds and ounces each week. This week she weighs 10 pounds. How many ounces does she weigh? 160 ounces ounces 20 ounces 16 ounces Houghton Mifflin Harcourt Publishing ompany

5 Homework and Practice Name Geometry and Measurement 4.8., 4.8. lso 4.8. MTHEMTIL PROESSES 4.1., 4.1.F, 4.1.G 15.3 ustomary Units of Weight omplete ounces = pounds 2. 3 tons = pounds 3. 7 pounds = ounces 5. 7 tons = pounds ounces = pounds ustomary Units of Weight 1 pound (lb) = 16 ounces (oz) 1 ton (T) = 2,000 pounds 4. 10,000 pounds = tons ounces = pounds 8. 8 pounds = ounces Problem Solving 9. Nathan has a truck that can carry 2 tons. How many pounds can the truck carry? 10. Julia bought 40 bags of compost. Each bag weighed 50 pounds. How many tons of compost did she buy? 11. Paul bought 3 packages of cheese. The packages weighed 11 ounces, 13 ounces, and 8 ounces. How many pounds of cheese did Paul buy? Explain. 12. arole needs 4 pounds of nuts for her granola. She has 26 ounces of walnuts and 28 ounces of cashews. How many ounces of peanuts should she buy so she has 4 pounds of nuts? Explain. Houghton Mifflin Harcourt Publishing ompany Module 15 Lesson 3 535

6 Lesson heck TEXS Test Prep Fill in the bubble completely to show your answer. 13. How many ounces of potatoes are in a 20 pound bag of potatoes? 40,000 ounces 3,200 ounces 320 ounces 2,000 ounces 14. construction company orders 12 tons of pea gravel. How many pounds of pea gravel do they order? 6,000 pounds 24,000 pounds 192 pounds 32,000 pounds 15. t the farmer s market, a bunch of bananas weighs 96 ounces. The price for the bananas is based on the weight in pounds. How many pounds does the bunch of bananas weigh? 16. Which statement about 36 ounces and 2 pounds is true? 36 ounces > 2 pounds 2 pounds = 36 ounces 6 pounds 36 ounces < 2 pounds 12 pounds 2 pounds > 36 ounces 1,536 pounds 96 pounds 17. Multi-Step Elizabeth has 4 jars of olives. Each jar contains 12 ounces of olives. How many pounds of olives does Elizabeth have? 18. Multi-Step Kevin picked 10 pounds of strawberries. He wants to freeze them in 8-ounce packages. How many 8-ounce packages of strawberries can Kevin make? 48 pounds 16 4 pounds pounds 12 pounds Houghton Mifflin Harcourt Publishing ompany