Final answer:
Decimal placeholders specify digit positions relative to the decimal point in decimal numbers and use zeros as placeholders when needed.
Explanation:
Decimal placeholders indicate the position of each digit in a decimal value concerning the decimal point. The first digit to the right of the decimal point is the tenth, followed by the hundredth and then the thousandth.
For example, in 0.735, the digit 7 is in the tenths place, 3 in the hundredths place, and 5 in the thousandths place.
When performing operations like multiplication, if there are not enough decimal places, use zeros as placeholders to ensure the correct positioning of digits.
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