5 Minute Check Complete on the back of your homework. 1 1. 3 x 12 3 2. 7 x 8 5 3. 6 x 15 2 4. 5 x 11

5 Minute Check Complete on the back of your homework. 1 1. 3 x 12

5 Minute Check Complete on the back of your homework. 1 1. 3 x 12 1 12 12 3 x 1 = 3 = 4

5 Minute Check Complete on the back of your homework. 3 2. 7 x 8 3 8 24 3 7 x 1 = 7 = 3 7

Friday, Oct 3 Lesson 6.4.3 Multiply Fractions

Objective: To understand how to estimate and multiply fractions.

Multiply Fractions To multiply fractions, multiply the numerators and multiply the denominators, then simplify if needed. Example x = 3 2 6 3 4 x 5 = 20 = 10 x =

Multiply Fractions When multiplying a fraction by a fraction, an estimate can be determined using a comparable number for the fractions.

Multiply Fractions When multiplying a fraction by a fraction, an estimate can be determined using a comparable number for the fractions. If a fraction is less than 1, we can use 0, or 1 as a comparable number.

Multiply Fractions If a fraction is less than 1, we can use 0, or 1 as a comparable number. 4 What is the comparable number for 7 ?

Multiply Fractions If a fraction is less than 1, we can use 0, or 1 as a comparable number. 4 What is the comparable number for 7 ? First, what is half the denominator?

Multiply Fractions If a fraction is less than 1, we can use 0, or 1 as a comparable number. 4 What is the comparable number for 7 ? First, what is half the denominator? 3

Multiply Fractions If a fraction is less than 1, we can use 0, or 1 as a comparable number. 4 What is the comparable number for 7 ? First, what is half the denominator? 3 Is the numerator closer to 0, 3 or 7?

Multiply Fractions If a fraction is less than 1, we can use 0, or 1 as a comparable number. 4 What is the comparable number for 7 ? First, what is half the denominator? 3 Is the numerator closer to 0, 3 or 7? 3 Which means the comparable number is .

Multiply Fractions If a fraction is less than 1, we can use 0, or 1 as a comparable number. 2 What is the comparable number for 9 ? First, what is half the denominator?

Multiply Fractions If a fraction is less than 1, we can use 0, or 1 as a comparable number. 2 What is the comparable number for 9 ? First, what is half the denominator? 4 Is the numerator closer to 0, 4 or 9?

Multiply Fractions If a fraction is less than 1, we can use 0, or 1 as a comparable number. 2 What is the comparable number for 9 ? First, what is half the denominator? 4 Is the numerator closer to 0, 4 or 9? 4 Which means the comparable number is 0.

Multiply Fractions If a fraction is less than 1, we can use 0, or 1 as a comparable number. 13 What is the comparable number for 15 ? 1

Multiply Fractions When estimating the product of two fractions, round each fraction to 0, or 1 and then multiply. All possible answers include: 0 x 0 = 0 0 x = 0 0 x 1 = 0 x = x 1 = 1 x 1 = 1

Multiply Fractions Can either be estimated up or down 0 1 0 1

Multiply Fractions Estimate and Multiply. 1 3 x 4 Estimate?

Multiply Fractions Estimate and Multiply. 1 3 x 4 1 2 x 0 = 0 Actual Product?

Multiply Fractions Estimate and Multiply. 1 3 x 4 0 Actual Product? 1 1 1 3 x 4 = 12 Is this a reasonable answer?

Multiply Fractions Estimate and Multiply. 1 3 x 4 0 Actual Product? 1 1 1 3 x 4 = 12 Is this a reasonable answer? Yes

Multiply Fractions and Whole Numbers Estimate and Multiply. 1 3 x 4 We can also use models to represent this problem.

Multiply Fractions and Whole Numbers Estimate and Multiply. 1 3 x 4 Divide a rectangle into 3 columns and 4 rows. Then shade section that is wide by 1/3 long. That represents 1/12 of the total.

Multiply Fractions Estimate and Multiply. 2 5 3 x 6 Do this on your own.

Multiply Fractions Estimate and Multiply. 2 5 3 x 6 Estimate?

MuMultiply Fractions Estimate and Multiply. 2 5 3 x 6 = 1 2 x 1 = 2 Actual Product?

Multiply Fractions Estimate and Multiply. 2 5 1 3 x 6 2 Actual Product? 2 5 10 5 3 x 2 = 18 = 9 Is this a reasonable answer?

Multiply Fractions Estimate and Multiply. 2 5 1 3 x 6 2 Actual Product? 2 5 10 5 3 x 6 = 18 = 9 5 1 Is this a reasonable answer? 9 2

Multiply Fractions Estimate and Multiply. 2 5 1 3 x 6 2 2 5 10 5 3 x 6 = 18 = 9

Multiply Fractions Estimate and Multiply. 1 8 x 2

Multiply Fractions Estimate and Multiply. 1 8 x 2 0 1 1 1 8 x 2 = 16

Multiply Fractions Estimate and Multiply. 3 5 10 x 6

Multiply Fractions Estimate and Multiply. 3 5 1 10 x 6 2 3 5 1 2 x 5 x 2 x 3 = 4

Multiply Fractions Estimate and Multiply. 4 3 9 x 8

Multiply Fractions Estimate and Multiply. 4 3 1 9 x 8 4 2 x 2 3 1 3 x 3 x 2 x 2 x 2 = 6

Multiply Fractions Estimate and Multiply. 4 9 x 18 Do this on your own. From yesterdays lesson.

Multiply Fractions Estimate and Multiply. 4 9 x 18 9 4 2x3x3 8 3x3 x 1 = 1 =8

Multiply Fractions Estimate and Multiply. 3 5 x 10 = Do this on your own.

Multiply Fractions Estimate and Multiply. 3 5 x 10 5 3 2 x 5 6 5 x 1 = 1 = 6

Multiply Fractions Estimate and Multiply. 4 7 x 15

Multiply Fractions Estimate and Multiply. 4 7 x 15 8 4 15 60 4 7 x 1 = 7 = 8 7

Multiply Fractions Estimate and Multiply. 1 1 1 3 x 4 x 5

Multiply Fractions Estimate and Multiply. 1 1 1 3 x 4 x 5 0 1 1 1 1 3 x 4 x 5 = 60

Multiply Fractions Frank had of the lawn left to mow. On Saturday he mowed 2/3 of what was left. What fraction of the lawn did he mow on Saturday? Do this on your own.

Multiply Fractions Frank had of the lawn left to mow. On Saturday he mowed 2/3 of what was left. What fraction of the lawn did he mow on Saturday? 1 2 1 2 x 3 = 3 To find the percentage or fraction of any number, multiply the number by the percentage (decimal equivalent) or fraction.

Multiply Fractions A paint store has 35 gallons of paint in storage, 2/5 of which are for outdoor use. The others are for indoor use. If each gallon costs $22, what is the total cost of the indoor paint in storage? Do this on your own.

Multiply Fractions A paint store has 35 gallons of paint in storage, 2/5 of which are for outdoor use. The others are for indoor use. If each gallon costs $22, what is the total cost of the indoor paint in storage? There is a couple of different ways to solve this problem. If 2/5 is outdoor paint, what fraction is indoor paint?

Multiply Fractions A paint store has 35 gallons of paint in storage, 2/5 of which are for outdoor use. The others are for indoor use. If each gallon costs $22, what is the total cost of the indoor paint in storage? If 2/5 is outdoor paint, what fraction is indoor paint? 3/5 What is 3/5 of 35 gallons?

Multiply Fractions A paint store has 35 gallons of paint in storage, 2/5 of which are for outdoor use. The others are for indoor use. If each gallon costs $22, what is the total cost of the indoor paint in storage? What is 3/5 of 35 gallons? 3 5x7 21 5 x 1 = 1 = 21 What is the cost of 21 gallons?

Multiply Fractions A paint store has 35 gallons of paint in storage, 2/5 of which are for outdoor use. The others are for indoor use. If each gallon costs $22, what is the total cost of the indoor paint in storage? What is the cost of 21 gallons? 21 x $22 = $462

Multiply Fractions True or False. The product of two fractions between 0 and 1 is also between 0 and 1.

Multiply Fractions True or False. The product of two fractions between 0 and 1 is also between 0 and 1. True

Multiply Fractions True or False. The product of a mixed number between 4 and 5 and a fraction between 0 and 1 is less than 4.

Multiply Fractions True or False. The product of a mixed number between 4 and 5 and a fraction between 0 and 1 is less than 4. 9 9 81 False; 4 10 x 10 = 4 100

Multiply Fractions True or False. The product of two mixed number between 4 and 5 is between 4 and 5.

Multiply Fractions True or False. The product of two mixed number between 4 and 5 is between 4 and 5. True

Multiply Fractions Agenda Notes No Homework Homework Practice 6.4.3 Show all work. Bring to my desk when complete. Mid-Chapter 6.4 Quiz Wednesday, Oct 8

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5 Minute Check Complete on the back of your homework. 1 1. 3 x 12 3 2. 7 x 8 5 3. 6 x 15 2 4. 5 x 11