5 Minute Check Complete on the back of your homework x x x x 11

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

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

5 Minute Check Complete on the back of your homework x 8

5 Minute Check Complete on the back of your homework x x 1 = 7 = 3 7

5 Minute Check Complete on the back of your homework x 15

5 Minute Check Complete on the back of your homework x x 1 = 6 = 12 2

5 Minute Check Complete on the back of your homework x 11

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

Friday, Oct 3 Lesson 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 = 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, ½ or 1 as a comparable number.

Multiply Fractions If a fraction is less than 1, we can use 0, ½ 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, ½ 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, ½ or 1 as a comparable number. 4 What is the comparable number for 7 ? First, what is half the denominator? 3 ½

Multiply Fractions If a fraction is less than 1, we can use 0, ½ or 1 as a comparable number. 4 What is the comparable number for 7 ? First, what is half the denominator? 3 ½ Is the numerator closer to 0, 3 ½ or 7?

Multiply Fractions If a fraction is less than 1, we can use 0, ½ or 1 as a comparable number. 4 What is the comparable number for 7 ? First, what is half the denominator? 3 ½ Is the numerator closer to 0, 3 ½ or 7? 3 ½ Which means the comparable number is ½.

Multiply Fractions If a fraction is less than 1, we can use 0, ½ 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, ½ or 1 as a comparable number. 2 What is the comparable number for 9 ? First, what is half the denominator? 4 ½ Is the numerator closer to 0, 4 ½ or 9?

Multiply Fractions If a fraction is less than 1, we can use 0, ½ or 1 as a comparable number. 2 What is the comparable number for 9 ? First, what is half the denominator? 4 ½ Is the numerator closer to 0, 4 ½ or 9? 4 ½ Which means the comparable number is 0.

Multiply Fractions If a fraction is less than 1, we can use 0, ½ or 1 as a comparable number. 5 What is the comparable number for 12 ?

Multiply Fractions If a fraction is less than 1, we can use 0, ½ or 1 as a comparable number. 5 What is the comparable number for 12 ? ½

Multiply Fractions If a fraction is less than 1, we can use 0, ½ or 1 as a comparable number. 13 What is the comparable number for 15 ?

Multiply Fractions If a fraction is less than 1, we can use 0, ½ 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, ½ or 1 and then multiply. All possible answers include: 0 x 0 = 0 0 x ½ = 0 0 x 1 = 0 ½ x ½ = ¼ ½ x 1 = ½ 1 x 1 = 1

Multiply Fractions Can either be estimated up or down 0 ¼ ½ ¾ 1 0 ½ 1

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

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

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

Multiply Fractions Estimate and Multiply. 1 3 x 4 ≈ 0 Actual Product? 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 ¼ wide by 1/3 long. That represents 1/12 of the total.

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

Multiply Fractions Estimate and Multiply x 6 Estimate?

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

Multiply Fractions Estimate and Multiply x 6 ≈ 2 Actual Product? x 2 = 18 = 9 Is this a reasonable answer?

Multiply Fractions Estimate and Multiply x 6 ≈ 2 Actual Product? x 6 = 18 = Is this a reasonable answer? 9 ≈ 2

Multiply Fractions Estimate and Multiply x 6 ≈ x 6 = 18 = 9

Multiply Fractions Estimate and Multiply. 1 8 x 2

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

Multiply Fractions Estimate and Multiply x 6

Multiply Fractions Estimate and Multiply x 6 ≈ x 5 x 2 x 3 = 4

Multiply Fractions Estimate and Multiply x 8

Multiply Fractions Estimate and Multiply x 8 ≈ 4 2 x x 3 x 2 x 2 x 2 = 6

Multiply Fractions Estimate and Multiply. 4 9 x 18 Do this on your own. From yesterday’s 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 ≈ x x 1 = 1 = 6

Multiply Fractions Estimate and Multiply. 4 7 x 15

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

Multiply Fractions Estimate and Multiply x 4 x 5

Multiply Fractions Estimate and Multiply x 4 x 5 ≈ x 4 x 5 = 60

Multiply Fractions Frank had ½ 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 ½ 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? 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 5x 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 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 Show all work. Bring to my desk when complete. Mid-Chapter 6.4 Quiz Wednesday, Oct 8