decimal point

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decimal point

The student places a decimal point between the two digits.

Definition
  1. Noun:
    • The dot used to separate the integer part from the fractional part in a decimal number: The "decimal point" is a punctuation mark (a dot or a comma, depending on the locale) that indicates where the whole number part ends and the fractional part begins in the decimal numeral system.
Usage
  • The primary function of the decimal point is to denote the boundary between units and tenths, hundredths, thousandths, etc.
  • In many English-speaking countries, the decimal point is represented by a period (), while in many other countries, a comma () is used.
Examples
  • Noun:
    • In the number 3.14159, the decimal point is the dot between the 3 and the 1.
    • When writing currency, such as $15.99, the decimal point separates the dollars from the cents.
    • The recipe calls for 1.5 liters of water, where the decimal point indicates one and a half liters.
Advanced Usage
  • "Floating point": In computing, this term relates to a method of representing real numbers where the decimal point's position can vary.
    • Floating-point arithmetic is used for calculations involving very large or very small numbers.
  • Significance of placement: The position of the decimal point determines the value's magnitude. Moving it changes the number by powers of ten.
    • Moving the decimal point one place to the right multiplies the number by ten.
Variants and Related Words
  • Decimal separator (n): A more general term for the symbol used to separate the integer and fractional parts, which can be a point or a comma.
    • The decimal separator varies internationally.
  • Radix point (n): A formal mathematical term for the dot in any base numeral system (e.g., binary point in base-2).
    • In binary, the radix point is called the binary point.
Synonyms
  • Point: (Informal, in mathematical contexts)
  • Dot: (Informal)
Related Phrases
  • To the right of the decimal point: Referring to the fractional part of a number.
    • The digits to the right of the decimal point represent tenths, hundredths, etc.
  • To the left of the decimal point: Referring to the integer (whole number) part.
    • All digits to the left of the decimal point are whole numbers.
Idioms
  • Lose the decimal point: To make a significant error in calculation or recording by misplacing the decimal point.
    • Be careful with your calculations; if you lose the decimal point, your answer could be off by a factor of ten.
decimal point

The student places a decimal point between the two digits.

Noun
  1. the dot at the left of a decimal fraction

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