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## 6th grade

### Course: 6th grade > Unit 2

Lesson 8: Dividing decimals- Dividing whole numbers to get a decimal
- Dividing whole numbers like 56÷35 to get a decimal
- Dividing a decimal by a whole number
- Dividing a whole number by a decimal
- Dividing decimals with hundredths
- Dividing decimals completely
- Long division with decimals
- Dividing decimals: hundredths
- Dividing by a multi-digit decimal
- Dividing decimals: thousandths
- Arithmetic with rational numbers FAQ

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# Dividing a decimal by a whole number

CCSS.Math:

Sal shows how to keep track of the decimal point when dividing a decimal by a whole number. Created by Sal Khan.

## Want to join the conversation?

- 0:22how should you divide if your number is a fraction? Like 11 4/6 divided by 5(16 votes)
- You would, make the 5 into a fraction like 5/1 and also make the fraction 11 4/6 to 37/3 then do the division problem. This is probably a late comment!(12 votes)

- does Khan Academy also have videos on how to divide decimals by decimals? If so, thank you.(8 votes)
- Try to use the search button and put what you are looking for in such as "divide decimal by decimal."(7 votes)

- 0:47Isn't that suppose to be 1 then 0. Or did I learn a different way?(6 votes)
- 7 does not go into 5, so it must be zero. 7 does go into 50 7 times with 1 remainder. Not sure how you learned it to get a 1 there.(6 votes)

- what would be 0.560 divided by 5?(4 votes)
- 0.112

try 560 divided by 5 which is 112 and you can just put that after the decimal(6 votes)

- how can you divide a decimal lets say 0.23 by 3 how do you do that?(5 votes)
- Since 0.23 has two numbers behind the decimal, we would multiply it by 100 to get 23. Then, in order to make it even, we would also have to multiply 3 by 100, giving us 23/300.(2 votes)

- Wait in1:04why does Sal make the zero in the decimal into a whole number (if you know what I mean) instead of making 5.0? Why'd he make 50?(3 votes)
- the decimal is taken care of above the division symbol, you do not carry it down.(6 votes)

- I get super confused on this can someone explain the steps of what to do pls.(3 votes)
- So if you learn how to divide two fractions, reciprocate the denominator and multiply, you can do this easily. If you have (3/2)/(4/9) reciprocate 4/9 to get 9/4 and multiply 3/2 * 4/9. If you understand this, do the same with dividing by whole numbers such as (3/2)/4. Change 4 to 4/1, so (3/2)/(4/1) = 3/2 * 1/4. The whole number will always just be multiplied by the denominator.(6 votes)

- ON top of my other question I just posted its has been suggested to just add a zero and keep going. I have noticed this also dose not work.. Sal if you see this please post another video that explains how to solve in cases like 6 divided by 0.75 or 6 divided by 0.03. So far everyone's comments haven't completed my knowledge. Thanks(5 votes)
- this is easy as heck(4 votes)
- Is "heck" a swear word? I think it is.(0 votes)

- so i was studying and got this question that i couldn't answer the question is 0.0001/200

and i know the answer which is 5×10^-7

but the problem is that idk how did we solve this thing like how bec earlier i used the calculator(2 votes)- How well do you know scientific notation? If you convert both to scientific notation, you get 1x10^-4/2x10^2. Rearranging gives 1/2 * 10^-4/10^2, to divide common bases, you subtract the exponents to get .5x10^-6, moving decimal to right adds one more negative (think .5x10/10 x10*-6) to get the answer you give. If you set it up like a regualar division problem, you would have to go to .0001000/200 which gives .0000005 which is the equivalent answer.(4 votes)

## Video transcript

Let's see if we can divide
5.005 by-- let's divide it by 7, and see what we get. So we can rewrite this
as 5.005 divided by 7. And the key here is to
keep track of the decimal. But other than
that, you're really treating it like a traditional
long division problem. So you want to put
the decimal, it's to the right of the ones place. So it's right over there. I just put the decimal
right above the decimal. And now we would
treat it just like a traditional long
division problem. So how many times
does 7 go into 5? Well, it goes into
5 zero times, and we could write 0 times 7 is 0. Actually, let's do
that, just to show that it works to kind of do the
process all the way through. 0 times 7 is 0. You subtract, you get 5. So you get this 5
right over here. So you get 5, and then we
can bring down another 0. We bring down this
0 right over here. So now we ask ourselves, how
many times does 7 go into 50? Well, 7 times 7 is 49, so
it's going to go seven times. 7 times 7, 49. Subtract, you get 1. And now we can
bring down this 0. Let's do that. We bring down that 0. 7 goes into 10 one time. 1 times 7 is 7. Subtract, get a 3. And now finally, we
can bring down this 5. We can bring down the 5. And we ask ourselves, how
many times does 7 go into 35? Well, 5 times 7 is 35. This goes 5 times. 5 times 7 is 35. Subtract, and we are done. We have divided it completely. And so 5.005 divided
by 7 is equal to 0.715.