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#### Lesson 2: Adding and Subtracting Decimals

### Adding and subtracting with decimals

#### Adding decimal numbers

#### Try This!

#### Subtracting Decimal Numbers

#### Try This!

### Assessment

/en/decimals/introduction-to-decimals/content/

**Adding** and **subtracting** decimals happens a lot in real life. You may find that you need to add up the cost of your groceries to see if you have enough money to pay for them. Or perhaps you need to subtract the cost of a bill from your bank account.

When you're adding or subtracting decimal numbers, it's important to set up the expression **correctly**. The **numbers** need to be in a certain place, and so do the **decimals**.

Click through the slideshow below to learn how to set up these expressions.

Now that we know how to set up problems with decimals, let's practice by solving a few. First, we'll work on **adding**. If you feel comfortable adding larger numbers, you're ready to add decimal numbers.

Click through the slideshow to learn how to add decimals.

Try solving these problems to practice adding decimal numbers.

12.20 + 12.20 =

5.40 + 45.80 =

3.85 + 9.67 =

On the previous page, you saw that **adding** numbers with decimals is a lot like adding other numbers. The same is true for **subtracting** numbers with decimals. If you can subtract large numbers, you can subtract numbers with decimals too!

Click through the slideshow to learn how to subtract decimals.

Try solving these problems to practice subtracting decimal numbers.

5.85 - 2.73 =

84.50 - 2.30 =

99.90 - 67.40 =

Want even more practice? Try out a short assessment to test your skills by clicking the link below:

/en/decimals/multiplying-and-dividing-decimals/content/