Q: Why do you need to learn how to subtract decimal numbers?

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3.87

They are representations of numbers which need not be whole numbers.

44444 - 11111 = 33333

To get my GED

beacuse you need to learn how to add sentences together and how to subtract or (seperate) them

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3.87

No, you need to find out the numbers to subtract then subtract.

To subtract 0.5 from 0.05 first line up the decimal points in your equation. If you need to add a zero behind the 5 in 0.5 so you get 0.50. Then subtract as if there was no decimal point (take it as 50-5). After you subtract bring the decimal point down. You should end up with 0.45.

By paying attention in school. You can also review your school textbooks - and read online articles about basic math. - Please note that you basically need to learn how to add, subtract, multiply and divide not just whole numbers, but also numbers with decimals, and fractions.

7 − 0.08 = 6.92

They are representations of numbers which need not be whole numbers.

44444 - 11111 = 33333

A decimal number is one way of representing numbers where each place for a digit has a place value that is ten times that of the place to its right. Most all the numbers that you familiar with (judging from your question) will be decimal numbers. A decimal number need not be a [decimal] fraction.

add? dont you mean subtract?

0.44 (If you have hundredths, you need to have 2 numbers after the decimal point.)

To get my GED

It is not. When multiplying two whole numbers you need not be concerned about placing the decimal point in the answer.