multiplicative comparisons

What is multiplcation?

• Multiplication is repeated addition, but it is also the inverse or opposite of division.

• When we divide, we look to separate into equal groups, while multiplication involves joining equal groups.

Key Words

When dealing with multiplicative comparisons there are a
few key words that you need to know and understand:

1)

As Many As : is how we are going to compare our

factors or the numbers we are multiplying

2)

The Equal Sign (=) means: “IS”

Example: 2 x 5 = 10

10 is 5 times as many as 2 or 10 is 2 times as many as 5

Key Words

Variable = Unknown

● The Unknown is what we do not know in the problem

or equation.

● We use letters to represent the Unknown or the

Variable

Example:

b x n = a

a is b times as many as n

• 56 is 8 times as many as 7 is the same as

  • 56=8x7 and

  • 56=7x8

• 72 is 8 times as many as 9 is the same as

  • 72=8x9 and

  • 72=9x8

I can write 2 comparison sentences for a multiplication equation:
18=2x9

1. 18 is 2 times as many as 9

2. 18 is 9 times as many as 2

I can write 2 comparison sentences for a multiplication equation:
120=12x10.

1. 120 is 10 times as many as 12

2. 120 is 12 times as many as 10.

Multiple Choice

There are nine times as many red jackets than blue jackets at the store. There are eight blue jackets at the store. How many red jackets are there?

9 x ___ = ___ 

9 x 8 = 72

• 72
• 56
• 80
• 64

Now it's your turn!

Multiple Choice

 Paul has six times as much money as Juan. Juan has twelve dollars. How much money does Paul have?

• 60 dollars
• 48 dollars
• 36 dollars
• 72 dollars

Multiple Choice

The Tigers scored nine times as many points as the Eagles. The Eagles score four points. How many points did the Tigers score?

• 36 points

• 24 points

• 12 points

• 48 points

Multiple Choice

Selena has thirty Snapchat friends. Julie has five times as many. How many Snapchat friends does Julie have?

• 150 friends

• 100 friends

• 75 friends

• 30 friends

Multiple Choice

There are four times as many lizards in the desert as there are snakes. There are sixteen snakes. How many lizards are in the desert?

• 64 Lizards

• 80 Lizards

• 48 Lizards

• 32 Lizards