The word decimal means relating to a system of numbers and arithmetic based on the number 10.
In Mathematics it usually means that fractions are not written as 1/2 or 3/50 but are written in numbers following a decimal point..... a device used to indicate that less than a whole unit is involved... so that 1/2 is represented as 0.5 and 3/50 is represented by 0.06
The .5 indicates 5 tenths of a unit, and the .06 indicates 6 hundredths of a unit.
Just as numbers such as 123 mean 1 hundred and 2 tens and 3 units, so the numbers to the right of the decimal point change in value by powers of ten as you go further along.
Also, scientific notation also has a lot to do with decimals and exponents, which you will learn in middle school.
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decimal system
The defining property of the decimal number system is that the place value of each digit is ten times the place value of the digit to its right.
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Base 2 system (Binary)Base 3 systemThere are too many numeration systems to name.
There are 9000 4-digit numbers in hindu-arabic numeration system