Date: 10/31/2001 at 12:10:14
From: Doctor Peterson
Subject: Re: Give the power of ten (decimals)
Hi, Mike.
A power of ten is a number formed by multiplying a bunch of 10's
together, like 1000 = 10*10*10. (I use "*" as the multiplication
sign.)
When you multiply a number by ten, you move the decimal point one
place to the right; for instance
12.0 * 10 = 120.
1.2 * 10 = 12.
So if you have to move the decimal point three places to the right to
make a whole number, then you are multiplying by ten three times, and
this is the same as multiplying by 1000:
1.234 * 1000 = 1.234 * 10*10*10
= 12.34 * 10*10
= 123.4 * 10
= 1234.
In other words, just count the decimal places, write that many zeros
after a 1, and you have the number by which you have to multiply to
eliminate the decimal point:
1.234 1000
\_/ \_/
3 3
The number 1000 is written as the third power of 10, or
3
1000 = 10*10*10 = 10
\______/
3
Does that help?
- Doctor Peterson, The Math Forum
Date: 10/31/2001 at 12:10:14From: Doctor PetersonSubject: Re: Give the power of ten (decimals)Hi, Mike.A power of ten is a number formed by multiplying a bunch of 10's together, like 1000 = 10*10*10. (I use "*" as the multiplication sign.)When you multiply a number by ten, you move the decimal point one place to the right; for instance 12.0 * 10 = 120. 1.2 * 10 = 12.So if you have to move the decimal point three places to the right to make a whole number, then you are multiplying by ten three times, and this is the same as multiplying by 1000: 1.234 * 1000 = 1.234 * 10*10*10 = 12.34 * 10*10 = 123.4 * 10 = 1234.In other words, just count the decimal places, write that many zeros after a 1, and you have the number by which you have to multiply to eliminate the decimal point: 1.234 1000 \_/ \_/ 3 3The number 1000 is written as the third power of 10, or 3 1000 = 10*10*10 = 10 \______/ 3Does that help?- Doctor Peterson, The Math Forum
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