Math Is Fun Forum

Zeeshan 01

Member

Registered: 2016-07-22

Posts: 746

decimal placement

hi when there is value such as    6.62894*10^-5 how we place decimall mean wht value become such as 00000. etc value how.solve this.type.of value

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Malik

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: decimal placement

Hi;

This was why I stressed a bit that right and left stuff. Helps you to remember

10^-5, when you see -5 it means move that decimal point to the left. Use zeros when you need to.

6.62894*10^-5 becomes .0000662894

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In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

Zeeshan 01

Member

Registered: 2016-07-22

Posts: 746

Re: decimal placement

what is mean by decimal is we use number line or other method and why your ans is not this         0.000662894

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Malik

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: decimal placement

That answer is off by a factor of 10:

Let us just follow the rule first.

6.62894*10^-5 means move the decimal point 5 digits to the left. So, doing that we get .0000662894

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In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

Zeeshan 01

Member

Registered: 2016-07-22

Posts: 746

Re: decimal placement

where its rule.or complete explaination

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Malik

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: decimal placement

Often we do not know the complete explanation for things. We believe in a supreme being that we know next to nothing about. We use electronic devices that few people can explain. We drive automobiles and few people know anything other than how to start the car. Ask the passengers on a jet that is cruising at 500 mph what is holding the plane up and they will just stare at you utterly confused by the question.

Let us just say that the rule works, learn it first and hopefully we can explain it someday.

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In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

Bob

Administrator

Registered: 2010-06-20

Posts: 10,641

Re: decimal placement

hi Zeeshan 01

When you divide by 10 the point moves one place.

So that's why you need to move the point 5 places.

Bob

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Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob

Zeeshan 01

Member

Registered: 2016-07-22

Posts: 746

Re: decimal placement

thax bob

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Malik