.50012 is very close to .5, or one half, as it differs only by twelve hundred-thousandths.
18.812 and 31.187
Decimals are there to show you a fraction. For example, 1 1/2 is the same as the decimal 1.5. It just shows you how close you are to a whole number in a different way than a fraction.
183 and 185 are the nearest whole numbers. If you use decimals, then there are an infinite amount of answers.
terminating decimals and repeating decimals
Two of them are terminating decimals and recurring decimals
terminating decimals non terminating decimals repeating decimals non repeating decimals
6.7,6.8,6.4,5.9
The answer depends on what you wish to do with decimals.
Terminating decimals are decimals that end, such as, 2.384. Non-terminating decimals that don't end, such as, 0.3333333333.......
You need decimals when you measure and fractions. You need decimals, because to measure and fractions. Also, so whole numbers could exist if there are decimals. There will be no math if there's no decimals.
3rd. Adding Decimals 5th - Adding and subtracting 6th - Dividing Decimals
Some decimals are. Counting numbers are a proper subset of decimals.