5 minute check estimate. complete in your notebook. 1 1. 5 x 26 5 1 2. 7 x 9 1 3 3. 4 3 x 2 4

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5 Minute Check Estimate. Complete in your notebook. 1 1. 5 x 26 5 1 2. 7 x 9 1 3 3. 4 3 x 2 4

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Tuesday, Oct 30

5 Minute CheckEstimate. Complete in your notebook. 1 1. 5 x 26

5 12. 7 x 9

1 33. 4 3 x 2 4

5 Minute CheckEstimate. Complete in your notebook. 1 1. 5 x 26

5 Minute CheckEstimate. Complete in your notebook. 1 1. 5 x 26 5

1 5 x 25 =

1 25 25 5 x 1 = 5 = 5

5 Minute CheckEstimate. Complete in your notebook. 5 12. 7 x 9

5 Minute CheckEstimate. Complete in your notebook. 5 12. 7 x 9 0

1 2 x 0 = 0

5 Minute CheckEstimate. Complete in your notebook. 1 33. 4 3 x 2 4

5 Minute CheckEstimate. Complete in your notebook. 1 33. 4 3 x 2 4 12

4 x 3 = 12FlashcardsTuesday, Oct 22Lesson 4.2

Multiply Fractions and Whole NumbersMultiply Fractions and Whole NumbersObjective: To understand how to multiply fractions and whole numbers.

Multiply Fractions and Whole NumbersAt the end of this lesson you should be able to answer the following question.

How is the process used to multiply a fraction and whole number similar to the process used to multiply two whole numbers?

Multiply Fractions and Whole NumbersTo 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 and Whole NumbersTo multiply a fraction and whole number, convert the whole number to a fraction, then multiply as before.Example 2 5 x 14

x = 2 14 28 3 5 x 1 = 5 = 55 x =

Multiply Fractions and Whole NumbersMultiply. 2 2 x 5 =

Estimate? Multiply Fractions and Whole NumbersMultiply. 2 2 x 5 =

Estimate?

2 2 4 1 x 4 = 4 = 1

Actual Product? Multiply Fractions and Whole NumbersMultiply. 2 2 x 5 =

Actual Product?

2 2 4 1 x 5 = 5

Is this a reasonable answer?Multiply Fractions and Whole NumbersMultiply. 2 2 x 5 =

Actual Product?

2 2 4 1 x 5 = 5 4 Is this a reasonable answer? 5 1Multiply Fractions and Whole NumbersMultiply. 2 6 x 3 =

(Do this on your own)Multiply Fractions and Whole NumbersMultiply. 2 6 x 3 =

Estimate?

Multiply Fractions and Whole NumbersMultiply. 2 6 x 3 =

Estimate?

Since 3 and 6 are in the same multiples list we really do not need an estimate.

Actual Product? Multiply Fractions and Whole NumbersMultiply. 2 6 x 3 =

Actual Product?

6 2 12 1 x 3 = 3 = 4 Multiply Fractions and Whole NumbersWhen multiplying a fraction by a whole number, the order of the factors does not change the product. This is true for any numbers and is an example of the Commutative Property.

Example 2 x 5 = 5 x 2

Multiply Fractions and Whole NumbersMultiply. 3 4 x 5 =

Estimate?

Multiply Fractions and Whole NumbersMultiply. 3 4 x 5 =

Estimate?

4 3 12 1 x 4 = 4 = 3

Actual Product? Multiply Fractions and Whole NumbersMultiply. 3 4 x 5 =

Actual Product?

4 3 12 2 1 x 5 = 5 = 2 5 Is this a reasonable answer? Multiply Fractions and Whole NumbersMultiply. 3 4 x 5 =

Actual Product?

4 3 12 2 1 x 5 = 5 = 2 5 2Is this a reasonable answer? 2 5 3Multiply Fractions and Whole NumbersMultiply. 1 4 x 5 =

Estimate?

Multiply Fractions and Whole NumbersMultiply. 1 4 x 5 =

Estimate?

1 4 4 4 x 1 = 4 =1

Actual Product?

Multiply Fractions and Whole NumbersMultiply. 1 4 x 5 =

Actual Product?

1 5 5 1 4 x 1 = 4 = 14 Is this a reasonable answer? Multiply Fractions and Whole NumbersMultiply. 1 4 x 5 =

Actual Product?

1 5 5 1 4 x 1 = 4 = 14 1Is this a reasonable answer? 1 4 1Multiply Fractions and Whole Numbers 4A sloth spends 5 of its life asleep. If a sloth lives to be 28 years old, how many years does it spend asleep?

(Do this on your own)

Multiply Fractions and Whole Numbers 4A sloth spends 5 of its life asleep. If a sloth lives to be 28 years old, how many years does it spend asleep?

Estimate?

Multiply Fractions and Whole Numbers 4A sloth spends 5 of its life asleep. If a sloth lives to be 28 years old, how many years does it spend asleep?

Estimate?

4 30 120 5 x 1 = 5 = 24

Actual Product?Multiply Fractions and Whole Numbers 4A sloth spends 5 of its life asleep. If a sloth lives to be 28 years old, how many years does it spend asleep?

Actual Product?

4 28 112 2 5 x 1 = 5 = 22 5

Is this a reasonable answer? Multiply Fractions and Whole Numbers 4A sloth spends 5 of its life asleep. If a sloth lives to be 28 years old, how many years does it spend asleep?

Actual Product?

4 28 112 2 5 x 1 = 5 = 22 5

2Is this a reasonable answer? 225 24Multiply Fractions and Whole NumbersOne evening, 2/3 of Mrs. Thornes students watched a reality TV show. Of Mrs. Lombardos students, 4/5 watched the same reality show. Which teacher had more students watch the show?

(Do this on your own)

Multiply Fractions and Whole NumbersOne evening, 2/3 of Mrs. Thornes students watched a reality TV show. Of Mrs. Lombardos students, 4/5 watched the same reality show. Which teacher had more students watch the show?

Mrs. T 2 36 72 3 x 1 = 3 =24

Mrs. L 4 30 120 5 x 1 = 5 = 24

Multiply Fractions and Whole NumbersNatalie multiplied 2/3 by 123 and got 156. Is this a reasonable answer?

Multiply Fractions and Whole NumbersNatalie multiplied 2/3 by 123 and got 156. Is this a reasonable answer?

No, because if you multiply a whole number by a fraction the answer will always be less than the whole number.

Multiply Fractions and Whole NumbersHow is the process used to multiply a fraction and whole number similar to the process used to multiply two whole numbers?

Multiply Fractions and Whole NumbersAgenda NotesHomework Homework Practice 4-2Show all workDue Wednesday, Oct 23

Mid Chapter 4 Quiz Monday, Oct 28