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Lesson 5-4

Lesson 5-4. Solving Fraction Equations: Multiplication and Division. Warm Up (4 minutes). Student Will Be Able To SWBAT/Definitions. SWBAT solve equations by multiplying & dividing. pp. 226-229 Definition Reciprocal Two numbers are reciprocals if their product is 1.

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Lesson 5-4

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  1. Lesson 5-4 Solving Fraction Equations: Multiplication and Division

  2. Warm Up (4 minutes)

  3. Student Will Be Able ToSWBAT/Definitions • SWBAT solve equations by multiplying & dividing. pp. 226-229 • Definition • Reciprocal • Two numbers are reciprocals if their product is 1. • Example: Numbers 1/5 and 5 are reciprocals and their product is 1/5 ● 5 = 1

  4. Skill Set – Solving Math Equations • r = 12 • Reciprocal of is • Multiply both sides by the reciprocal

  5. Skill Set – Solving Word Problems • Problem 1: Dexter makes dog biscuits for the animal shelter. He makes of a recipe and uses 15 cups of powdered milk. How many cups of powdered milk are in the recipe? • Problem 2. A recipe for a loaf of bread calls for cup of oatmeal. How much oatmeal do you need if you double the recipe?

  6. Problem 1: Dexter makes dog biscuits for the animal shelter. He makes of a recipe and uses 15 cups of powdered milk. How many cups of powdered milk are in the recipe? Step 1. Read the problem. Step 2 Identify the variable(s) – Who and What 15 cups ? Cups of Powdered Milk: Step 3. Draw the unit bar (powdered milk in the whole recipe) Step 4. Reread the question and adjust the unit bar. Step 5. Annotate the question, "How many cups of powdered milk are in the recipe? Step 6. Do the computation. 1 unit = ? 1 unit = 20 cups Step 7. Write a grammatically correct sentence. "The dog biscuit recipe has 20 cups of powdered milk."

  7. Problem 2. A recipe for a loaf of bread calls for cup of oatmeal. How much oatmeal do you need if you double the recipe? Step 1. Read the problem. Step 2 Identify the variable(s) – Who and What 15 cups Recipe’s cups of oatmeal: Double recipe’s cups of oatmeal: ? Step 3. Draw the unit bar (cup of oatmeal in recipe) Step 4. Reread the question and adjust the unit bar. Step 5. Annotate the question, "How many cups of oatmeal if the recipe is doubled? Step 6. Do the computation. 2 units = ? 2 unit = cups Step 7. Write a grammatically correct sentence. "The bread recipe has cups of oatmeal."

  8. Lesson Assessment

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