## Model Multiplication

I have three bags of candy. Each bag has 5 candies in it. How many pieces of candy do I have altogether?

To solve this problem, I can do many things. First, I could add 5 three times for each bag of candy: 5 + 5 + 5 = 15 candies. I could even draw a picture showing the bags and candies and count up 15 pieces. OR, I can use MULTIPLICATION!

MULTIPLICATION is one of the four math operations. We multiply when we have many groups and want to find the total amount. Basically, MULTIPLICATION is like repeated addition.

We can model, or show, MULTIPLICATION is two ways: repeated addition and arrays.

To solve this problem, I can do many things. First, I could add 5 three times for each bag of candy: 5 + 5 + 5 = 15 candies. I could even draw a picture showing the bags and candies and count up 15 pieces. OR, I can use MULTIPLICATION!

MULTIPLICATION is one of the four math operations. We multiply when we have many groups and want to find the total amount. Basically, MULTIPLICATION is like repeated addition.

We can model, or show, MULTIPLICATION is two ways: repeated addition and arrays.

## Repeated addition

Think back about the bags of candies. I can find the total number of candies:

## additionYou can write an addition sentence:
5 + 5 + 5 = 15 (Three groups of 5 = 15) |
## multiplicationYou can write a multiplication sentence:
3 X 5 = 15 Three times five equal 15 (Three groups of 5 = 15) |

Watch the following video:

By: krimsten, http://www.teachertube.com/viewVideo.php?video_id=63316

## arrays

Another way to model multiplication is using an array. An arrays organizes objects into rows and columns. To find the total number of candies, we can show the candies in arrays. Look at the ARRAYS below which show 3 x 5 = 15 and 5 x 3 = 15.

You will notice that 5 x 3 was the same as 3 x 5. We will explore this more on the Multiplication Properties page.

Watch the following video on arrays.

Watch the following video on arrays.

By: learnzillionvideo, http://youtu.be/iDXH9tfVqAI

## practice makes perfect!

## Stop! Quick Check

Click on the button below to take the quick check on model multiplication.