Mathematics Concepts

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Numeral

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A symbol used to name a number (example: one ; 1)

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Positive Rational Numbers

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The set of numbers that can be expressed as a fraction a/b, where a and b are counting (natural) numbers. (Example 3/4 = 3 over 4).

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Place Value

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The value of a digit as determined by its location in a number such as ones, tens, hundreds, one thousands, etc.

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Standard Form

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The representation of a number using digits (e.g., 1,200)

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Word Form

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The representation of a number using written words (e.g., 1,153 as one thousand, one hundred fifty-three)

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Expanded Form

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The representation of a number as a sum of place values (e.g., 1,187 as 1,000 + 100 + 80 + 7)

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Decimal Number

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A number in the base-10 place value system used to represent a quantity that may include part of a whole and is recorded with a decimal point separating the whole from the part. (Ex: 0.5 = 1/2)

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Trailing Zeros

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A sequence of zeros in the decimal part of a number that follow the last non-zero digit, and whether recorded or deleted, does not change the value of the number. (Example 1.45 = 1.450)

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Compare Numbers

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To consider the value of two numbers to determine which number is greater or less or if the numbers are equal in value. (Example: 0.5 > 0.3) (Symbols , =)

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Order Numbers

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To arrange a set of numbers based on their numerical value. (Example: Greatest to Least 2.45, 1.50, 0.35)