Q:
# Why are decimals important?

A:
### Quick Answer

**Decimals are important because people use them everyday in different situations, such as counting money, looking at price tags, reading an odometer and reviewing Olympic scores.** The decimal system is a way to express large and small numbers by utilizing the decimal point.

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Similarly, using the decimal system is less cumbersome than writing, adding, subtracting or multiplying mixed numbers with fractions. For example, it is easier to write ten and a half as 10.5 than as 10 1/2. Adding decimals like 10.5 and 29.75 is much easier than add 10 1/2 and 29 3/4, where you need to replace the fractions with common denominators before adding them. Likewise, it is easier to compare decimal numbers than fractions.

The decimal system, which uses base 10, is a system used for calculation in the sciences and engineering disciplines that can require more precision. Additionally, people need decimals in everyday life for the most basic of tasks.

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Q:
## How do you multiply decimals?

A:To multiply decimals, add up the number of decimal places, remove the decimal points and multiply the numbers. After calculating, place the decimal into the answer using the original number of added decimal places.

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Q:
## How do you do long division with decimals?

A:Long division with decimals is functionally the same as long division without decimals, but you have to move the decimal point of the divisor and dividend so you have a whole number.

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Q:
## How do you read decimals?

A:To read a decimal, say the number to the left of the decimal point as a whole number. Use the word "and" to indicate the decimal point. Read the number to the right of the decimal point as a whole number, ending with the place value of the last digit.

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Q:
## How do you write decimals in standard form?

A:To write decimals in standard form, move the decimal point to the right until it is at the right of the first nonzero digit. Then, multiply the number by 10 to the power of the negative of the number of spaces the decimal point was moved.

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