Unit 5, Lesson 11
Pounds and Ounces
Grade 4
Warm-up
Notice and Wonder: A Recipe
Standards Alignment
Building On
Addressing
Building Toward
4.MD.1
Know relative sizes of measurement units within one system of units including km, m, cm; kg, g; lb, oz.; l, ml; hr, min, sec. Within a single system of measurement, express measurements in a larger unit in terms of a smaller unit. Record measurement equivalents in a two column table. For example, know that 1 ft is 12 times as long as 1 in. Express the length of a 4 ft snake as 48 in. Generate a conversion table for feet and inches listing the number pairs (1, 12), (2, 24), (3, 36), …
4.MD.2
Use the four operations to solve word problems involving distances, intervals of time, liquid volumes, masses of objects, and money, including problems involving simple fractions or decimals, and problems that require expressing measurements given in a larger unit in terms of a smaller unit. Represent measurement quantities using diagrams such as number line diagrams that feature a measurement scale.
What do you notice? What do you wonder?
Picture of a recipe. List of 5 ingredients. 14 ounces of rice. 1 half pound of ground beef. 2 cans parentheses 2 pounds of kidney beans, drained and rinsed. 1 Jar parentheses 24 ounces of picante sauce. 12 ounces of shredded cheddar cheese.
Activity 1
Pounds and Ounces
Standards Alignment
Building On
Addressing
4.MD.1
Know relative sizes of measurement units within one system of units including km, m, cm; kg, g; lb, oz.; l, ml; hr, min, sec. Within a single system of measurement, express measurements in a larger unit in terms of a smaller unit. Record measurement equivalents in a two column table. For example, know that 1 ft is 12 times as long as 1 in. Express the length of a 4 ft snake as 48 in. Generate a conversion table for feet and inches listing the number pairs (1, 12), (2, 24), (3, 36), …
Building Toward
Your teacher will show images of some packaged food items.
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Use the information on the images to find out how pounds (lb) and ounces (oz) are related.
- Write a sentence to describe the relationship between the 2 units.
- Use 2 pieces of information to show that your conclusion is correct.
- Complete this table, with amounts in ounces.
pounds (lb) ounces (oz) 1 2 3 4 5 8 10
Activity 2
Party Prep
Standards Alignment
Building On
Addressing
4.MD.2
Use the four operations to solve word problems involving distances, intervals of time, liquid volumes, masses of objects, and money, including problems involving simple fractions or decimals, and problems that require expressing measurements given in a larger unit in terms of a smaller unit. Represent measurement quantities using diagrams such as number line diagrams that feature a measurement scale.
4.OA.3
Solve multistep word problems posed with whole numbers and having whole-number answers using the four operations, including problems in which remainders must be interpreted. Represent these problems using equations with a letter standing for the unknown quantity. Assess the reasonableness of answers using mental computation and estimation strategies including rounding.
Building Toward
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A family is cooking for a party and needs to buy some ingredients for a main dish:
- 5 pounds of rice
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pound of almonds - 2 pounds 8 ounces of pinto beans
How many ounces of each ingredient does the family need to buy? Show your reasoning.
- To make the dessert, they need 6 pounds of flour. If they already have 40 ounces of flour in the pantry, how many more ounces of flour do they need to buy?
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