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### Course: 5th grade > Unit 1

Lesson 3: Decimals in expanded form# Decimals in expanded form review

Review writing decimals in expanded form, and try some practice problems.

## Expanded form

**Expanded form**is a way to write numbers by adding the value of its digits.

We can use a place value chart to think of the value of a number's digit.

### Example

Let's write ${3}.{4}{0}{5}$ in expanded form.

Ones | . | Tenths | Hundredths | Thousandths |
---|---|---|---|---|

. |

$3.405$ in expanded form is ${3}+{{\displaystyle \frac{4}{10}}}+{{\displaystyle \frac{5}{1000}}}$ .

*Want to learn more about expanded form? Check out this video.*

## Want to join the conversation?

- Why are decimals so hard? I mean I get all the practice and they just seem so hard once I do them.(33 votes)
- Sometimes the concepts give us fits and are hard to understand. You just need to keep practicing, and then before too long you'll have that "AHA" moment where it will all make sense.

Sometimes I recommend using money to work with decimals. After all, $3.95 and $79.50 are decimals, and if you practice adding money (two items at $3.95), how much will your bill be? If you practice subtracting money (something costs $9.37 and you give a $10.00 bill, how much change will you get)

Keep at it. You can do it!!(106 votes)

- I don't understand the practice for Decimals in expanded form, Can someone help(26 votes)
- Basically in a decimal, there are 4 places,

ones. tenths | hundredths | thousandths

so for example here is a decimal, 4.209

4, is in the ones place

2, is in the tenths place

0, is in the hundredths place

9, is in the thousandths place.

So expanded form is just add the ones, tenths, hundredths, and thousandths place together

For example,

We have our decimal 4.209,

so the expanded form is 4 + 0.2 + 0.00 0.009(49 votes)

- Why did math became so popluar(25 votes)
- it did not just people had to use it a lot(11 votes)

- dose any one use this just to chat(21 votes)
- I like doing math even though that I'm bad at it(17 votes)
- i don't understand (8x1000)+(6x100)+(2x10)+(4x1+(3x1/100)(11 votes)
- You do all the things in () first before adding them all together. Your question's answer is 8,624.03(19 votes)

- Math is sometimes interesting when you know how to easily do it, but when you're not that good at math, you might hate math cuz you think its hard but its not(18 votes)
- I learn this in school I used to be bad but now Im decent!(17 votes)
- that's amazing I'm getting better at math too(0 votes)

- Do u guys like cheese pizza?(13 votes)
- I prefer mines cheezy!:3(9 votes)

- my "Decimals in expanded from" doesn't work so it put me here.😅(18 votes)
- haha wow your lucky(1 vote)