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### What is 65 Times Ten Million?

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Date: 29 Mar 1995 14:40:58 -0500
From: Susan Fisher
Subject: Question about times one million

Dear Dr. Math,

What is 65 times ten million?  Also, we've had pluses,
multiples and times. Is there going to be any new things
after that?

Thanks for trying even if you don't get that one.

Eli Golden
Swampscott, Mass.

email: sfisher@id.wing.net
```

```
Date: 29 Mar 1995 18:21:50 -0500
From: Dr. Ken
Subject: Re: Question about times one million

Hello there!

isn't as hard as you might think.  First notice that ten
million is 10,000,000.  When you multiply by a number
like 10 or 1,000 or something like that, you just take
all the zeroes from one number and stick them on the
other one.  For instance, 6 x 10 = 60,  57 x 100 = 5700,
and 65 x 10,000,000 = 650,000,000.  So that's the

something new.  I hope I'm not spoiling the surprise.  You
know how addition and subtraction are opposites?  By
that I mean if 3 + 5 = 8, then 8 - 5 = 3, and things like
that.  Well, there's going to be a new operation that you'll
learn that's the opposite of multiplication.  It's called
"division."  The good part is, if you know how to multiply,
you'll learn how to divide really fast:  for instance, since
4 x 5 = 20, 20 divided by 4 is 5.  Does that make sense?
It'll get a whole lot easier when you do it more.

Thanks for the question!

-Ken "Dr." Math
```
Associated Topics:
Elementary Multiplication

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