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Natural Numbers - Regular counting numbers.

Negative Number - A number less than zero. For instance - a decimal .10

Net - Often referred to in elementary school math. A flattened 3-D shape that can be turned into a 3-D object with glue/tape and folding.

Nth Root - The nth root of a number is the number needed to multiply by itself 'n' times in order to get that number. For instance: the 4th root of 3 is 81 because 3 X 3 X 3 X 3 = 81.

Norm - The mean or the average - an established pattern or form.

Numerator - The top number in a fraction. In 1/2, 1 is the numerator and 2 is the denomenator. The numerator is the portion of the denominator.

Number Line - A line in which points all correspond to numbers.

Numeral - A written symbol referring to a number.

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