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.Know More
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.Learn more about Fractions & Percentages
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.Full Answer >
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.Full Answer >
Subtracting decimals involves writing the two decimals one below the other and making sure that the decimal points line up before subtracting in the normal manner. However, the larger decimal should be placed above the smaller one. Similarly, if the two decimals do not have the same length, then add zeroes before subtracting them.Full Answer >
Decimals are most often used when referring to money. If someone has $3.42, for example, he has three whole dollars and 42/100 of a dollar. Most people find it easier to compare two decimals than two fractions.Full Answer >