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### Course: Staging content lifeboatΒ >Β Unit 14

Lesson 50: Multiplying and dividing decimals by 10, 100, and 1000# Multiplying decimals by 10, 100, and 1000

Practice multiplying decimals by 10, 100, and 1000.

## Part 1: Multiplying decimals by 10

**Key idea:**Multiplying by 10 moves every digit

*one place to the left*.

## Let's try a few more.

## Part 2: Multiplying decimals by 100

**Key idea:**Multiplying by 100 moves every digit

*two places to the left*.

## Let's try a few more.

## Part 3: Multiplying decimals by 1,000

**Key idea:**Multiplying by 1,000 moves every digit

*three places to the left*.

## Let's try a few more.

## Part 4: Let's look at the pattern.

## Part 5: Challenge time!

Use the pattern above to answer the following questions.

## Want to join the conversation?

- this is so easy(54 votes)
- it might be hard for other people(32 votes)

- why is it so hard for me(35 votes)
- Another way to think of it is, shift the decimal point to the right. 23 = 23.0 so 23x10 = 230(20 votes)

- the 100's were kinda hard but the 10's were good(35 votes)
- think about like this: if you want to multiply shift the decimal point to the right based on the numbers of zeros. for example if you want to multiply 4.25 X 10 you will shift the decimal point one time to the right (because there is one zero in the ten). if you want to multiply 4.35 X 100 you will shift the decimal point two times to the right because there is two zeros in the 100.(37 votes)

- it's okay I mean hard but it's okay(23 votes)
- I got 1 incorrect but I got the other correct(19 votes)
- Can you just divide by a fraction? Ex: instead of 1.2 x 100, 1.2 / 1/100. If yes, why aren't they showing that? If no, why not?(4 votes)
- You can, but the reason they are not showing that is because this method is slightly easier to do mentally and visually.(3 votes)

- Is Potato really Potato?(5 votes)
- on part 3 do you still need to put the 0 before the 6?(4 votes)
- ya it was easy for me but dont just say that or you go help them(3 votes)
- For anyone confused, just count the zeros and move the decimal point to the right that many times, and remember, there is an infinite number of zeros behind the decimal/ decimal point.(3 votes)
- Oh yes, I do that too(1 vote)