who created decimals?

According to Google, a Scottish mathematician named John Napier created them. I wish he hadn't, they're so BORING!

how do you get this down so fast i cant understand a bit!

Keep trying and you will get it down...like they always say ¨Practice makes perfect:)¨

can you get points for doing good work :\

Do you mean Khan Academy's energy points? If so, yes! You'll get energy points for doing practice problems and watching videos. :)

These seem really easy... am I missing something? If not, I look forward to the unit test! Can you make these a bit harder?

I say don't push your luck. unit tests can get harder and if you do decimals with heart or, as a matter of fact, you do anything with heart it becomes easy.

when was decimals first used in history?🤔

*4th Century BC* The first decimal system was introduced in the 4th Century BC by the Sumerians of Mesopotamia, to whom the invention of writing is credited. They based their numerical system on powers of 60 subdivided into multiples of 10.

why are decimals called decimals and also how were numbers made?

numbers were made in the pristoric times when people used them in the caves on the wall and desimals were made in china and then it got to the middle east and then boom here we are doing desimals

how do i spend energy points?

You cannot spend energy points, however, if you get enough of them, you can earn some neat badges!

Are decimals odd or even? Or better, are they prime?

Neither. Classification of odd or even only applies to integers. And the domain of prime numbers is only of positive integers greater than 1.

Main content

5th grade

Course: 5th grade > Unit 1

Lesson 1: Decimal place value intro

Decimal place value review

CCSS.Math:

5.NBT.A.3

5.NBT.A.3a

Google Classroom

Review decimal place value, and try some practice problems.

Place value chart

The number 87, point, 654 can be placed on a place value chart as follows:

Tens	Ones	.	Tenths	Hundredths	Thousandths
8	7	point	6	5	4

Decimal place value

The first digit after the decimal represents the tenths place. The next digit after the decimal represents the hundredths place. The remaining digits continue to fill in the place values until there are no digits left.

Example: 0, point, 81

The number 0, point, start color #11accd, 8, end color #11accd, start color #1fab54, 1, end color #1fab54 is made up of start color #11accd, 8, end color #11accd tenths and start color #1fab54, 1, end color #1fab54 hundredth.

We can also write this as:

0, point, start color #11accd, 8, end color #11accd, start color #1fab54, 1, end color #1fab54, equals, start color #11accd, 0, point, 8, end color #11accd, plus, start color #1fab54, 0, point, 01, end color #1fab54

0, point, start color #11accd, 8, end color #11accd, start color #1fab54, 1, end color #1fab54, equals, start color #11accd, start fraction, 8, divided by, 10, end fraction, end color #11accd, plus, start color #1fab54, start fraction, 1, divided by, 100, end fraction, end color #1fab54

Or we can use a place value chart:

Ones	.	Tenths	Hundredths
0	point	start color #11accd, 8, end color #11accd	start color #1fab54, 1, end color #1fab54

Want to learn more about decimal place value? Check out this video.

Want to review whole number place value? Check out this article.

Practice

Problem 1

Current

The digit start color #1fab54, 9, end color #1fab54 in which number represents a value of 0, point, 009?

(Choice A)
2, point, 0, start color #1fab54, 9, end color #1fab54, 5
(Choice B)
8, start color #1fab54, 9, end color #1fab54, comma, 653
(Choice C)
0, point, 72, start color #1fab54, 9, end color #1fab54

Want to try more problems like this? Check out these exercises:
Decimal place value names
Value of a decimal digit

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De La Rosa.Camila
Posted 4 years ago. Direct link to De La Rosa.Camila's post “who created decimals?”
who created decimals?
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(133 votes)
Answer
- - Nihira -
  Posted 4 months ago. Direct link to - Nihira -'s post “According to Google, a Sc...”
  According to Google, a Scottish mathematician named John Napier created them. I wish he hadn't, they're so BORING!
  Comment on - Nihira -'s post “According to Google, a Sc...”
  (26 votes)
Gabriella Spiker
Posted 6 years ago. Direct link to Gabriella Spiker's post “how do you get this down ...”
how do you get this down so fast i cant understand a bit!
Button navigates to signup pageComment on Gabriella Spiker's post “how do you get this down ...”
(36 votes)
Answer
- LILYW
  Posted 2 years ago. Direct link to LILYW's post “Keep trying and you will ...”
  Keep trying and you will get it down...like they always say ¨Practice makes perfect:)¨
  Comment on LILYW's post “Keep trying and you will ...”
  (68 votes)
Hayden Linyard
Posted 4 years ago. Direct link to Hayden Linyard's post “These seem really easy......”
These seem really easy... am I missing something? If not, I look forward to the unit test! Can you make these a bit harder?
Button navigates to signup pageComment on Hayden Linyard's post “These seem really easy......”
(33 votes)
Answer
- Albatross Prime
  Posted 2 years ago. Direct link to Albatross Prime's post “I say don't push your luc...”
  I say don't push your luck. unit tests can get harder and if you do decimals with heart or, as a matter of fact, you do anything with heart it becomes easy.
  Comment on Albatross Prime's post “I say don't push your luc...”
  (30 votes)
Tyler M
Posted 2 years ago. Direct link to Tyler M's post “can you get points for do...”
can you get points for doing good work
:\
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(36 votes)
Answer
- Evan
  Posted 2 years ago. Direct link to Evan's post “Do you mean Khan Academy'...”
  Do you mean Khan Academy's energy points? If so, yes! You'll get energy points for doing practice problems and watching videos. :)
  Comment on Evan's post “Do you mean Khan Academy'...”
  (41 votes)
Caroline Thompson
Posted 2 years ago. Direct link to Caroline Thompson's post “when was decimals first u...”
when was decimals first used in history?🤔
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(12 votes)
Answer
- ℙ𝕒𝕥𝕣𝕚𝕔𝕜
  Posted 2 years ago. Direct link to ℙ𝕒𝕥𝕣𝕚𝕔𝕜's post “*4th Century BC* The firs...”
  4th Century BC
  The first decimal system was introduced in the 4th Century BC by the Sumerians of Mesopotamia, to whom the invention of writing is credited. They based their numerical system on powers of 60 subdivided into multiples of 10.
  Comment on ℙ𝕒𝕥𝕣𝕚𝕔𝕜's post “*4th Century BC* The firs...”
  (28 votes)
kcoombs861
Posted 2 years ago. Direct link to kcoombs861's post “i put in 6 tenths but it ...”
i put in 6 tenths but it says WRONG
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(10 votes)
Answer
- ZoeB
  Posted 12 days ago. Direct link to ZoeB's post “For real tho”
  For real tho
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  (2 votes)
28jmoya
Posted 2 years ago. Direct link to 28jmoya's post “how do i spend energy poi...”
how do i spend energy points?
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(8 votes)
Answer
- ℙ𝕒𝕥𝕣𝕚𝕔𝕜
  Posted 2 years ago. Direct link to ℙ𝕒𝕥𝕣𝕚𝕔𝕜's post “You cannot spend energy p...”
  You cannot spend energy points, however, if you get enough of them, you can earn some neat badges!
  Comment on ℙ𝕒𝕥𝕣𝕚𝕔𝕜's post “You cannot spend energy p...”
  (14 votes)
CristianM
Posted 3 years ago. Direct link to CristianM's post “why are decimals called d...”
why are decimals called decimals and also how were numbers made?
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(9 votes)
Answer
- Adam
  Posted 6 months ago. Direct link to Adam's post “numbers were made in the ...”
  numbers were made in the pristoric times when people used them in the caves on the wall and desimals were made in china and then it got to the middle east and then boom here we are doing desimals
  Comment on Adam's post “numbers were made in the ...”
  (3 votes)
cripicy_
Posted a year ago. Direct link to cripicy_'s post “Are decimals odd or even?...”
Are decimals odd or even? Or better, are they prime?
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(5 votes)
Answer
- Philip
  Posted a year ago. Direct link to Philip's post “Neither. Classification o...”
  Neither. Classification of odd or even only applies to integers. And the domain of prime numbers is only of positive integers greater than 1.
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  (6 votes)
REHEHEHEHEHEHE
Posted 4 months ago. Direct link to REHEHEHEHEHEHE's post “like and subscribe for 10...”
like and subscribe for 10000 years of good luck
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- cwrigh50a
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  10,000 years of good luck
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  (1 vote)