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### Five from Twenty-five

```
Date: 07/22/97 at 16:56:05
From: Chris
Subject: Division

How many times can you take 5 away from 25?

Chris!
```

```
Date: 07/28/97 at 10:27:01
From: Doctor Rob
Subject: Re: Division

You can take 5 away from 25 as many times as you like, but you will
always get an answer of 20:

25 - 5 = 20
25 - 5 = 20
25 - 5 = 20
...

You can take 5 away from 25 as many times as you like:
25 - 5 - 5 - ... - 5 = ??.
If the number of 5's is more that 5, the answer will be negative.

You can only take 5 away from 25 once.  That leaves you with 2, from
which you can't take a 5 away.

Or, if what you want to do is to keep subtracting 5 from 25 until you
get to 0:

25 - 5 = 20
20 - 5 = 15
15 - 5 = 10
10 - 5 =  5
5 - 5 =  0

That's 5 subtractions, which shows you that there are five 5's in 25
and that 25 divided by 5 is 5.

-Doctors Rob and Sarah,  The Math Forum
Check out our web site!  http://mathforum.org/dr.math/
```
Associated Topics:
Elementary Division
Elementary Subtraction

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