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 N is for ...
 nanoNano is a prefix meaning one billionth (1 x 10-9). A nanometer is a unit of measure equal to one billionth (1 x 10-9) of a meter. A nanosecond is a unit of measure equal to one billionth (1 x 10-9) of a second. nanometerA nanometer is a unit of measure equal to 10 angstroms, which is one billionth (1 x 10-9) of a meter. natural numberThe natural numbers (also called counting numbers) are the positive whole numbers, 1, 2, 3, 4, 5... . Mathematicians usually include the number zero with the natural numbers. negative numberA negative number is a a number less than zero, like -1, -2, -3/4, etc. netThe net of a polyhedron is an unfolded polyhedron, a series of connected polygons. The picture above is the net of a cube. Newton, IsaacIsaac Newton (1642-1727) was an English mathematician and physicist who invented calculus (simultaneously with, but independently of Leibniz), formulated the laws of gravitation, investigated the nature of light (he discovered that sunlight is made of light of different colors), and the laws of motion: 1. An object in uniform motion tends to remain in that state of motion unless an external force is applied to it (the Law of Inertia). 2. A force causes a change in the velocity (acceleration) of an object (F=ma). 3. For every action there is an equal and opposite reaction. Newton also improved the design of the telescope (using an objective mirror instead of a lens), and it is now called a Newtonian telescope. nineNine is the number between eight and ten. There are nine players on a baseball team. A nine-sided figure is called a nonagon. 19nineteenNineteen is the number between eighteen and twenty. A nineteen-sided polygon is called an enneadecagon. nonagonA nonagon is a nine-sided polygon. normalIn mathematics, a normal line is perpendicular (at right angles) to the tangent of a curve. { }null setThe null set is the empty set, a set with no members. numberNumbers tell you "how many" or "how much." Some numbers are -12, 0, 5, 1/2, 1.33333, π, 1600. number lineA number line is a line in which real numbers can be placed, according to their value. Each point on a number line corresponds to a real number, and each real number has a unique point that corresponds to it. For example, the number 1.5 (1 1/2) corresponds to the point on a number line that is halfway between one and two. numeralA numeral is a symbol for a number. For example, the symbol 2 is the numeral we use to represent the number two. In our base ten numbers, there are 10 numerals: 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9. numeratorThe numerator is the top number in a fraction. 1, 2, 3, 4, 5numerical orderWhen numbers are in numerical order, they are in order from lowest to highest.

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 Number Line Fractions Decimals Graphs Measurement Rounding

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