Multiplicative Comparisons

Multiplicative Comparisons

Multiplication as Comparison

I can multiply to compare

Let's do some warm ups!!

Multiple Choice

How many apples are there?

Choose the correct multiplication sentence.

• 3 x 4 = 12

• 2 x 5 = 10

• 5 x 3 = 15

Multiple Choice

Choose the correct addition sentence representing this picture.

• 3 + 3 + 3 + 3 =12

• 4 + 4 + 4 =12

• 2 x 3 = 6

Times

Times as many

Times as much

Multiply

Compare

Multiple Choice

Mona made 21 cupcakes. This is three times as many what Aysha made. How many cupcakes did Aysha make?

• 7 cupcakes

• 63 cupcakes

• 3 cupcakes

Key Terms

• Factor

• Commutative Property

Factor

Factor: numbers that are multiplied together to get the answer (product).

Example:

8 x 5 = 40; Factors are 8,5

3 x 7 = 21; Factors are 3,7

9x2 = 18 ; Factors are ____

6 x 4 = 24; Factors are ____

Commutative Property

You can multiply two numbers (factors) in any order. It doesn't matter which factor comes first the product (answer) will be the same.

Example: Commutative Property

7x3=21 __x __= 21

Multiple Select

Identify all the factors in the following problem: 4 x 5 = 20

(hint there are 2 answers)

• 4

• 20

• 5

Multiple Choice

True of False: 10 x 2 is the same as 2 x 10.

• True

• False

Multiple Choice

Select the correct operation (use your chart for help):

Jamir did 20 pushups on Monday, he did 5 fewer pushups on Tuesday. How many more pushups did he do on Monday than on Tuesday?

• add

• subtract

• multiply

• divide

Multiple Choice

Select the correct operation (use your chart for help):

Ke'Neice has 5 apples. She goes to the store and buys 10 more. How many apples does she have in total?

• add

• multiply

• subtract

• divide

Multiple Choice

Select the correct operation (use your chart for help):

Miss Rodarte is 26. Her mom is twice as old as her. How old is her mom?

• add

• subtract

• multiply

• divide

Poll

How do you feel after this lesson?

• I don't understand.

• I can do it with help.

• I understand and can teach the class.

• I understand.

Multiple Select

Which answer below shows a comparison sentence for 5 x 4 = 20

Select all that apply.

• 20 is 4 times as many as 5

• 5 more than 4 is 20

• 4 times 20 is 5

• 5 times as many as 4 is 20

Multiple Select

Write an equation for 2 times as many as 8 is 16.

Check all that apply.

• 2 + 8 =16

• 2 x 8 =16

• 8 x 2 =16

• 16 - 2=8

Let's REVIEW!!!

Multiplicative Comparisons

To write a multiplicative comparison as a multiplication equation, replace the

words with symbols. See the example.

Here is another example.

• The wording of the comparison will determine where you put the equals sign in your equation.

• The equal sign is not always at the end.

To Write a Multiplicative Comparison

• Read the equation

• Replace the symbols with words

• x: times as many/ times as much

• = : is

IMPORTANT!!!

x- times AS MANY/ times AS MUCH

The x does NOT just mean times.

Open Ended

Write a multiplication comparison sentence for: 24 =4 x 6,

use this sentence stem to help you write it .

____ is ____ times as many as ____.

Multiple Choice

6 times as many as _____ is 48.

• 7

• 9

• 8

• 6

Multiple Choice

28 is 7 times as many as ____.

• 6

• 4

• 8

• 5

Multiple Choice

Emma has 5 times as many softballs as Bryce. Together they have 35 softballs. How many does Emma have?

• 24

• 6

• 30

• 7

Multiple Choice

Zack has completed 4 times as many levels in Freckle as David. David has completed 9 levels. How many has Zack completed?

• 15

• 18

• 36

• 10

Multiple Choice

Estimate the product. 35 x 4 =

• 210

• 140

• 320

• 350

Multiple Choice

Make a comparison sentence.

54= 9 x 6

____ is _____ times as many as _____.

• 6 is 9 times as many as 54

• 54 is 9 times as many as 6

• 9 is 6 times as many as 54

Multiple Choice

Find the product.

326 x 8 =

• 2,468

• 2,408

• 2,602

• 2,608

Multiple Choice

Katy has 7 times as many nickels as Shaun. Shaun has 8 nickels. How many nickels does Katy have?

• 15

• 1

• 56

• 24

Multiple Choice

Amber tied 35 knots. Hunter tied some too. Amber tied 5 times as many as Hunter. How many did Hunter tie?

• 175

• 7

• 30

• 5

Multiple Choice

Joe played piano for h hours. His sister played for 18 hours, which was 9 times as many as Joe. Which equation matches?

• 162 = 18 x h; h = 9

• 36 = 18 x h; h = 2

• 18 = 9 x h; h = 2

• 18 = 2 x h; h = 9

Multiple Choice

Tina walked 30 miles for a fundraiser. Lia walked m miles. Tina walked 5 times as far as Lia. Which equation matches?

• m = 5 x 30

• 30 = 5 x m

• 30 = m + 5

• m = 30 + 5

Multiple Choice

Natalia scored 9 points in the game. Carmen scored 6 times as many points as Natalia. How many points did Carmen score?

• 3

• 54

• 15

• 63

Multiple Choice

Emma ran 3 times as far as Sonia. Sonia ran 4 miles. How far did Emma run? Emma says she ran 7 miles? True or False?

• True

• False

Multiple Choice

Molly had 10 times as many stickers as Gabby. Gabby had 7 stickers. Molly said that she had 70 tickers. True or False?

• True

• False

Multiple Choice

Cesar ate 5 times as many cookies as Liam. Cesar ate 15 cookies. How many did Liam eat?

• 3

• 30

• 13

• 45

Multiple Choice

Buying ice skates is 8 times greater than renting. The cost to buy ice skates is $64. How much does it cost to rent?

• $512

• $72

• $56

• $8

Multiple Choice

Joe has some baseball cards. Erin has 5 times as many as Joe. Erin has 45 cards. How many does Jo have?

• 45

• 5

• 9

• 1

Multiple Choice

Choose the correct number sentence for:

21=3×7

• 21 times 3 is as many is 7

• 3 times as many as 21 is 7

• 21 is 3 times as many as 7

• 7 times as many as 21 is 3

Multiple Choice

Choose the correct equation for:

9 times as many as 5 is 45

• 5 x 45 =9

• 9 x 5 = 45

• 9 x 45 = 5

• 4 x 5 = 20

Multiple Choice

Choose the correct number sentence for:

6 times as many as 6 is 36

• $$6\times6=36$$
  

• $$36\div6=6$$

• $$6\times36=6$$

• $$6+6=36$$

Multiple Choice

Choose the correct number sentence for:

56 = 8 x 7

• 56 is 8 times as many as 7

• 7 is 56 times as many as 7

• 8 is 7 times as many as 56

• 56 is as many as 7 is 56

Multiple Choice

Choose the correct equation for:

12 times as many as 2 is 24

• $$24\times2=12$$
  

• $$3\times4=12$$

• $$12\div4=3$$

• $$12\times2=24$$

Multiple Choice

Choose the correct number sentence for:

30 = 10 x 3

• 3 is 30 times as many as 10

• 7 is 56 times as many as 7

• 30 is 10 times as many as 3

• 10 is times as many as 30 is 3

Multiple Choice

Choose the correct equation for:

7 times as many as 7 is 49

• $$49\times7=7$$

• $$49\div7=7$$

• $$7\times7=49$$

• $$7+7=49$$

Multiple Choice

Peter won 6 tickets yesterday. Today Peter won 3 times more tickets than yesterday. How many tickets did peter win today?

• 24

• 34

• 18

• 6

Multiple Choice

Tracy raised $50 for the shelter last year. This year she raised $100. How many times more did she raise than last year.

50 x n = 100

• 3

• 2

• 1

• 0

Multiple Choice

Bob has 3 times more birds than Paul. Bob has 24 birds. How many birds does Paul have?

3 x n = 24

• 8

• 3

• 7

• 6