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Math for Kids23 chapters | 325 lessons

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Instructor:
*Dina Albert*

In this lesson we will unwrap the ~'magic~' of multiplication and apply what we know about adding to multiplying. We will look at times in real life when multiplication will come in handy!

Before a magician can do magic tricks, he needs to learn the steps and tools to make the trick work. The same goes for a 'Math-Magician'! Multiplication is the trick we're learning today. We'll use addition in our steps and use some pictures as our tools. Let's become Math-Magicians!

Whether you knew it or not, sometimes you already do multiplication just by adding!

**Multiplication** is **adding** equal groups.

Take a look at these three groups of cookies:

Since each group has 5 cookies in it, they are **equal** groups.

We could count each cookie one by one, but we can also add by 5's.

5 + 5 + 5 = 15 cookies total in the picture

You have three friends, and each of them wants two apples. You need to know how many apples to buy altogether. We can find the answer to this question by looking at the image of the apples.

We can add by 2's to find the total number of apples. 2 + 2 + 2 = 6 apples total. So, you need to buy 6 apples.

In the picture, each pack has 6 markers. You are buying 4 packs of them. Let's add by 6 to figure out how many markers you will have altogether.

6 + 6 + 6 + 6 = 24 total markers altogether

Let's look again at the picture of the apples:

Earlier, we wrote 2 + 2 + 2

To rewrite this in multiplication terms:

1. Write down how many equal groups there are.

2. Write down the number of items in each group.

3. Put the symbol X in between the two numbers. This represents multiplying.

In the apple example, there are 3 (groups) X 2 (items in each group).

When we multiply 3 x 2, we are adding 3 groups of 2 apples together. In the picture, there are 6 apples total. So, 3 x 2 = 2 + 2 + 2 = 6 apples total

First, we will count the number of equal groups. In this case, there are 2 equal groups.

Next, we will count the number of soda bottles in one group. There are 4 soda bottles.

Finally, we will put the multiplication symbol in between both numbers: 2 x 4

So, we have:

2 (groups) x 4 (bottles in each group)

= 4 (bottles in group 1) + 4 (bottles in group 2) = 8 soda bottles altogether.

2 x 4 = 8

3 x 4 = 12 cookies

3 (groups) x 4 (cookies in each group) = 12 cookies altogether

4 (in group 1) + 4 (in group 2) + 4 (in group 3) = 4 + 4 + 4 = 12

4 groups of 5 apples in each group

= 5 apples + 5 apples + 5 apples + 5 apples

= 20 apples total, so 4 x 5 = 20

**Multiplication**is a quicker way of**adding equal**groups.- If you are given a multiplication problem, try rewriting the problem using addition.
- The first number tells you how many times to add. The second number is the number you should be adding.

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Math for Kids23 chapters | 325 lessons

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