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What is a decimal? What's it good for? What's it mean? How does a decimal point affect adding and subtracting? Multiplying and dividing?

This is for algebra class! it would be very appreciated if you answered in full!

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A decimal can indicate a PART like a fraction indicates a part.
To change a fraction to a decimal,
divide on a calculator or using long division.
Examples: 1/2 = 0.5, 1 1/5 = 1.2
Adding & Subtracting decimals,
line up the decimal points.
Example: 3.46
+ .13
______
3.59
Multiplying decimals, line up numbers on right. Count all decimal places; then move decimal point in answer that many places.
Example: 12.34
x .2
_____
2.468
Dividing decimals, I'll just give an
Example: 3.42
_____
2 | 6.84
----
A decimal is used for some things that a fraction isn't used for.
Example:
\$1.50 instead of \$1 1/2

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Hi Claire, I read thru your answer, and Im so glad that you explained it so plainly! Thank you! I voted it helpful and fun! I read today in NY Post that The actress that plays Miss O'Brien on Downton A. Gas been hired for another BBC series, and her character on DA will be written as leaving too. I'm not sure that I will miss her, she did such a good job of being so mean!!! I decided that you would want to know :). Bye Love! Beth
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Beth, thanks for your compliment.
I'll miss O'Brien because I'll miss having someone to hate! ( That's not very nice of me. But it's true.)
Also I'll miss the 2 spitcurls on her forehead.
I'm watching Around the World in Eighty Days. Jules Verne wrote the book and I love all the movies based on his books. Like 20,000 Leagues under the Sea, Journey to the Center of the Earth, and Journey to the Moon. More soon, Love, Claire
PS Petey says, "Purr......"
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Spit curls! I forgot that was what the were called! You're so cute! You remember stuff that I forgot! I'm watch A Star is Born with Streisand and Kristofferson, she wrote the music and he just cannot song her stuff well at all! I'm waiting for him to die and her to sing Evergreen. Which is my very favorite song of hers, which is your fave?
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It means this:
If you subtract it eats the whole world and if you add it spits up.
No need to thank me.

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