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## 5th grade (2018 edition)

### Unit 4: Lesson 3

Decimals in written form

# Decimals in written form (thousandths)

Learn to write 20,000.507 using words. Created by Sal Khan.

## Want to join the conversation?

• this confuses me so much
(13 votes)
• same, this is crazy😝
(7 votes)
• Hi, if you have any questions, just ask.
(5 votes)
• Have you tried watching a video again?
That might help. :D
(6 votes)
• five hundred and fitty four thousandhs
(4 votes)
• what is 3198,001.632 in decimal work form
(3 votes)
• Three million, one hundred ninety-eight thousand one and six hundred thirty-two thousanths will be the answer ;)
(5 votes)
• My son is writing decimals in word form and he did not put the "dash" between the number before the decimal and got it counted wrong. For example, for 85.8 he wrote: eighty five and eight tenths and got it counted wrong because it was suppose to be eighty - five and eight tenths. Do you think this should have been counted wrong? I surely don't! If so please explain your reasoning. Thanks you!
(2 votes)
• I don't think so, I agree with your reasoning. The dash is not really needed, but it's a way to show that the number is "connected" and one number.
(7 votes)
• Do decimal numbers keep going

And at like you added a comma in 20,000 so I’m confused
(3 votes)
• It depends on what kind of decimal you have. Like if you have 0.5, or one half, it can have infinite zeros after the 5. it would like this: 0.5000000000000000. No matter how many zeros you put after the 0.5 it will not change its value. If you were to add a number in there like this: 0.501000, it is no longer exactly one half. Other numbers like pi have an infinite amount of numbers too. It would look like this: 3.1415926535... (dot dot dots are added to show that the number is a "non terminating decimal")
I hope that helps
(4 votes)
• can we just say for example 700.5 seven hundred point five?
(1 vote)
• yes, but if you are in a purely mathematical scenario, you might want to use seven hundred and five tenths
(5 votes)
• I am In College technical math and have always used a calculator to do this simple math how do u write 643.30211 in words. know how to write any thing to the left of the decimal in words but when u combine the tenths place with the hundredths place it confuses me
(0 votes)
• So when you deal with decimals you always have to remember that the first number to the right of the decimal is a tenth. The one after it is a hundreth. Say that you have the fraction 1/10. In words, you can say that 1/10 is one tenth and in decimal form, it is 0.1. I'm not sure if I answered your question but I hope this helped.
(2 votes)
• How to write two and five thousandths as a decimal
(3 votes)
• 2.005

Because:
(ones).(tenths)(hundredths)(thousandths)

We need 2 in the ones place, and 5 in the thousandths. We put zeroes everywhere else.
(1 vote)
• I am confused even tho i study.
(3 votes)

## Video transcript

So I'm going to write out a number that we're going to think about how we could say or actually write that number. So I'm just going to write it out. I'm going to resist the temptation to actually speak it out because that's normally how I operate. But I'm not going to do that right now. So there's several ways that we can pronounce. So I encourage you to pause it and try to pronounce it, yourself. You might not even need to pause it. Well, the first thing that jumps out, well we've got 20,000 and then some. So maybe we should write it that way. So we've got 20,000. 20-- actually let me write it out as numbers first to really decompose it. So we have 20,000. And then what do we have on top of that? Well we have 5/10. This is the tenths place. So we can literally write that as 5/10. 5/10. Then we have 0, 0/100. I'll write that as a hundredths place just so that we can keep track of it. And then finally, we have 7/1000, that's the 1000th place. So we could write that, plus 7/1000. So if we would write down everything that I just spoke out loud, we would say that this is 20-- let me write that a little bit neater. This is 20,000. 20,000 and 5/10. And 5-- let me write out the word-- and 5/10 and 7/1000. Now, this isn't the only way to say this. Another way of thinking about it is to try to merge the 5/10 and the 7/1000 in terms of thousandths. So let's think about this. So we could write this as-- so once again, we would have our 20,000. But instead of 5/10 and 7/1000, let's write our 5/10 in terms of thousandths. And the easiest way to do it is to multiply the numerator and denominator, both here, by 100. So then we will have-- so this 5/10 is the same thing as 500 over 1,000. And the 7/1000 is still 7/1000. And these two combined are 507/1000. So we could just call this 20,000 and 507/1000. so let's write that down. So we could just say this is 20,000 and 507/1000. This is 1/1000, while this right over here, 1,000, of course, actually represents 1,000. So we got 20 thousands, that's that right over there, and 507/1000.