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Chapter 2.4

Chapter 2.4. Bell Work. Find the GCF of the numbers 18, 24 12, 36 Shane bicycled 3 5/6 miles. Express the distance as an improper fraction. Answers . Find the GCF of the numbers 18, 24 = 6 12, 36 =12 Shane bicycled 3 5/6 miles. Express the distance as an improper fraction.

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Chapter 2.4

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  1. Chapter 2.4

  2. Bell Work • Find the GCF of the numbers • 18, 24 • 12, 36 • Shane bicycled 3 5/6 miles. Express the distance as an improper fraction.

  3. Answers • Find the GCF of the numbers • 18, 24 = 6 • 12, 36 =12 • Shane bicycled 3 5/6 miles. Express the distance as an improper fraction. • 23/6

  4. Objectives • Students will be able to multiply fractions and mixed numbers with 80% accuracy. • Essential Question- How do you multiply two mixed numbers? • NS 2.1- Students will solve problems involving multiplication of positive fractions and explain why a particular operation was used.

  5. Vocabulary • GCF- • Mixed number- • Improper fraction-

  6. Vocabulary • GCF- this is used to help us simplify a fraction. We must divide the numerator and denominator by the GCF. • Mixed number- this is when we have a whole number and a fraction. • Improper fraction- this is when we have a fraction that has a numerator larger than its denominator.

  7. Multiplying Fractions • To solve these types of problems you will be applying standard NS 2.1- multiplying fractions to solve a problem. • Step 1- check to see if you can divide out common factors using the GCF. (cross cancel) • Step 2- multiply the numerator. • Step 3- multiply the denominator. • Step 4- simplify (write your answer in a mixed number if needed)

  8. Don’t Forget • When multiplying a fraction and a whole number, the whole number is the numerator over 1. 18= 18/1 • Complete #’s 1-8, page 88-89 • 1) independently 8 min. • 2) partner (error analysis) 5 min. • 3) poll and review

  9. Multiplying Mixed Numbers • ***Step 1- write the mixed numbers as improper fractions • Step 2- check to see if you can divide out common factors using the GCF. (cross cancel) • Step 2- multiply the numerator. • Step 3- multiply the denominator. • Step 4- simplify (write your answer in a mixed number if needed)

  10. Complete #’s 9-12, page 90 • 1) independently 5 min. • 2) partner (error analysis) 5 min. • 3) poll and review

  11. Closing the lesson What are the mistakes in problems 1 and 2? 3. Explain how to multiply two mixed numbers.

  12. Exit Ticket • 2/5 X 45 • 5/8 X 6/25 • 5 ¼ X 1 3/7 • Find the product of 3/4 X 36. • A recipe calls for 1/4 cups of diced tomatoes. Mia is making three times the recipe. How many cups of diced tomatoes should she use?

  13. Homework • Page 90 #’s 15-18 • Page 91 #’s 31-34 • Due Thursday

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