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Because they are simply for 'padding' - Take for example the following numbers... 12.3, 10.02, 11.004... in order to make them easier to add up, you would 'pad' the shorter numbers with zero's to make them all the same length. Thus 12.3 becomes 12.300 and 10.02 becomes 10.020.

It's easier to add...

10.020

11.004

12.300

Than to add...

10.02

11.004

12.3

Note, however, that adding extra zeros to the right of the decimal point implies greater precision in the number so, when you express the final result, your should do error analysis and write the correct number of digits based on the individual accuracies.

Q: Why is it ok to write additional zeros to the right of a decimal without affecting its value?

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yes. any thing you have on the right side of the decimal point(.) is a decimal:)

Anything to the right of the decimal point.

A decimal is a way of representing a number in such a way that the place value of each digit is ten times that of the digit to its right. A decimal representation does not require a decimal point. Adding zeros after the decimal point is wrong because they imply a degree of accuracy (significant figures) for which there is no justification.So, without a decimal, 11530 is either just a string of 5 digits or it is a number in some other base (>5).

It can refer to the part to the right of the decimal point.

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Count the digits to the right of the decimal and divide the digits number, without a decimal, by 1 with (2 + number of digits right of decimal) zeros. So. 490.4% = 4904/100 = 4.904

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The second decimal place to the right of the decimal point is called the hundredths place

yes. any thing you have on the right side of the decimal point(.) is a decimal:)

Anything to the right of the decimal point.

A decimal is a way of representing a number in such a way that the place value of each digit is ten times that of the digit to its right. A decimal representation does not require a decimal point. Adding zeros after the decimal point is wrong because they imply a degree of accuracy (significant figures) for which there is no justification.So, without a decimal, 11530 is either just a string of 5 digits or it is a number in some other base (>5).

right

It can refer to the part to the right of the decimal point.

Move the decimal point three places to the right.

by moving the decimal two place to the right.

A decimal number is simply a way of representing a number in such a way that the place value of each digit is ten times that of the digit to its right. If it does not contain a fractional part then the decimal representation does not require a decimal point. So 89. is actually simply 89, without the decimal point.