Multiplication and Division

Introduction to Multiplication

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#### Lesson 1: Introduction to Multiplication

### What is multiplication?

#### Writing multiplication expressions

#### Try this!

### Solving multiplication problems

#### Try this!

### Practice!

#### Set 1

#### Set 2

#### Set 3

When you **multiply**, you're basically adding a certain number more than once. For instance, if you eat 4 pieces of candy, then you eat another 4, then 4 more, you can say that you **multiplied **the amount of candy you ate.

Multiplication happens all the time in real life. For example, consider the situation below.

As you just saw, a **multiplication expression** is written like this:

2 x 6

You can read that expression as **two times six**. The multiplication symbol (x) can also be called the **times symbol**. Remember, you always put it **between** the numbers you want to multiply.

Many real-life situations can be expressed with multiplication. For instance, imagine that you want to make three cakes. The recipe says that each cake will need two eggs. In other words, you need 3 x 2 eggs.

Write the following situations as multiplication expressions. Don't try to solve them yet.

You have **six** pairs of **two** socks each.

You need to take **two** pills **four** times a day.

Each bag contains **nine** donuts. You buy **three** bags.

You can use counting and adding to solve some small, simple multiplication problems. For example, on the last page, we were trying to figure out how many eggs we'd need to make three cakes. Each cake needed two eggs, so we wrote the problem like this:

3 x 2

As you know by now, that expression means **three times two**, or 3 cakes with 2 eggs each. It's a simple problem. To solve it, you can either **count** the eggs or **add** them: 2 + 2 + 2. Either way, the answer is 6. We know that 3 x 2 = 6.

While this works for small problems, counting **large numbers** can take a long time— and it's pretty boring too. For this reason, most people **memorize **common multiplication problems so that they can solve them quickly. If this sounds hard, don't worry. The more you** practice**, the easier it will be to remember the answers to problems.

Until then, you can solve multiplication problems by using a **multiplication table**. It's also called a **times table**. A times table is a chart with the answers to all of the multiplication problems that use the numbers 1 through 12. It's simple to use. Click through the slideshow below to learn how.

You might have noticed there is no **0** row in the times table. That's because zero times anything is just **zero**. For example, 5 x 0 = 0 and 0 x 100 = 0.

Solve the following multiplication problems. You can use the times table as a reference if needed. Check your answer by typing it into the box.

4 x 6 =

7 x 11=

5 x 1 =

Practice multiplication with these problems. If you want, you can use the **times table**. There are **3** sets of problems. Each set has **5** problems.

3 x 2 =

4 x 1 =

2 x 5 =

4 x 3 =

2 x 7 =

7 x 6 =

4 x 6 =

8 x 7 =

9 x 10 =

12 x 5 =

4 x 9 =

8 x 1 =

6 x 5 =

10 x 8 =

12 x 12 =

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