Glossary Entries
A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z| Natural Number | 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. |
| Negative Number | A number that is less than zero; located to the left of zero on the number line. |
| Net | A two-dimensional shape that can be folded into a three-dimensional figure is a net of that figure. |
| Nickel | A coin with a value of 5 cents or 1/20 of a dollar. |
| Nonadjacent Side of an Angle | 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. |
| Nonagon | A polygon with nine sides and nine angles. |
| Noncollinear | Not lying on the same straight line. |
| Nonlinear Equation | An equation or inequality that, when represented graphically, results in a graph that is not a straight line (e.g., circle, parabola, hyperbola). |
| Nonrepeating Decimal | A decimal that does not repeat; it either terminates or continues in no discernible pattern. |
| Nonstandard Measurement | 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). |
| Nonstandard Unit | Any real item that can be used to measure. Examples include paperclips, pants, cookies, and nuts. |
| Nonterminating Decimal | A decimal that does not terminate; it either repeats or continues in no discernible pattern. |
| Number | The concept of an amount, quantity, or how many items there are in a collection. |
| Number Line | A line on which each point represents a real number. |
| Number Sense | Having a good conceptual understanding of numbers and number concepts. |
| Number Sentence | A mathematical statement that has numbers, at least one operation sign, and an equal or inequality sign. |
| Number System | A system used to represent numbers. (See base ten number system) |
| Numeral | A symbol that represents a number. |
| Numeration | The act or process of counting or numbering; a system of counting or numbering. |
| Numerator | 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. |
| Numeric Expression | Any combination of words, variables, constants, and/or operators that result in a number; also known as an arithmetic expression. |
| Numeric Pattern | An arrangement of numbers that repeat or that follow a specified rule. |
| Numerically | Expressed in or involving numbers or a number system. |
Useful Reference Materials
Wikipedia:https://en.wikipedia.org/wiki/Fraction_%28mathematics%29
Encyclopædia Britannica:
http://www.britannica.com/topic/fraction
University of Delaware:
https://sites.google.com/a/udel.edu/fractions/
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