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Natural Number
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A natural number is a positive integer or a non-negative integer. There is a small difference because non-negative integers also include "0." A list of positive integers would only include whole numbers, but not zero. Natural numbers include 1,2,3,4,5... infinity-1, infinity. They are all whole numbers. Natural numbers do not include negative numbers, fractions, or decimals. |
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Negative Number
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A number that is less than zero; located to the left of zero on the number line. |
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Net
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A two-dimensional shape that can be folded into a three-dimensional figure is a net of that figure. |
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Nickel
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A coin with a value of 5 cents or 1/20 of a dollar. |
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Nonadjacent Side of an Angle
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Theside of the triangle that does not make up either side ofthe angle;the side opposite the specified angle; usually used in trigonometric ratios of the acute angles of a right triangle. |
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Nonagon
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A polygon with nine sides and nine angles. |
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Noncollinear
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Not lying on the same straight line. |
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Nonlinear Equation
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An equation or inequality that, when represented graphically, results in a graph that is not a straight line (e.g., circle, parabola, hyperbola). |
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Nonrepeating Decimal
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A decimal that does not repeat; it either terminates or continues in no discernible pattern. |
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Nonstandard Measurement
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The use of items as measurement tools that are not uniform in size (e.g., using fingers to measure something; one person's fingers are not necessarily the same size as another person's fingers). |
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Nonstandard Unit
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Any real item that can be used to measure. Examples include paperclips, pants, cookies, and nuts. |
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Nonterminating Decimal
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A decimal that does not terminate; it either repeats or continues in no discernible pattern. |
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Number
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The concept of an amount, quantity, or how many items there are in a collection. |
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Number Line
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A line on which each point represents a real number. |
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Number Sense
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Having a good conceptual understanding of numbers and number concepts. |
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Number Sentence
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A mathematical statement that has numbers, at least one operation sign, and an equal or inequality sign. |
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Number System
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A system used to represent numbers. (See base ten number system) |
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Numeral
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A symbol that represents a number. |
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Numeration
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The act or process of counting or numbering; a system of counting or numbering. |
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Numerator
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The top number of a fraction. For 3/4 the numerator is 3. It is the number of equal parts (numerator) of the total number of parts (denominator) in a fraction. |
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Numeric Expression
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Any combination of words, variables, constants, and/or operators that result in a number; also known as an arithmetic expression. |
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Numeric Pattern
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An arrangement of numbers that repeat or that follow a specified rule. |
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Numerically
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Expressed in or involving numbers or a number system. |
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