Chapter 2.4

Bell Work

1. Find the GCF of the numbers1. 18, 242. 12, 363. Shane bicycled 3 5/6 miles. Express the distance

as an improper fraction.

Answers

1. Find the GCF of the numbers1. 18, 24 = 62. 12, 36 =123. Shane bicycled 3 5/6 miles. Express the distance

as an improper fraction.– 23/6

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.

Vocabulary

• GCF-• Mixed number-• Improper fraction-

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.

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)

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

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)

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

Closing the lesson

3. Explain how to multiply two mixed numbers.

What are the mistakes in problems 1 and 2?

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?

Homework

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