Cool math .com - Online Math Dictionary

Online Math Dictionary: N
Easy to understand math definitions for K-Algebra mathematics
Just scroll down or click on the word you want and I'll scroll down for you!

natural numbers	negative numbers	nonagon
null set	number	number line
numerals	numerator

Natural numbers
The Natural numbers are: { 1, 2, 3, 4, 5, 6, ... }
The natural numbers are the counting numbers without zero.

Negative numbers
Negative numbers are those that appear to the left of zero on the number line.

Nonagon
A nonagon is a nine sided polygon. The picture on the right is a regular nonagon since all the sides and angles are the same. (congruent.)
For more info, check out Properties of Nonagons.

nonagon

Null set
A null set is the same as an "empty set." A null set is a set with no members (or elements). The symbol for the null set is on the right.
It can also be written as an empty set of set brackets:
{ }
Putting the null set symbol inside the set brackets is a bad thing... But, is a common mistake, so don't do it!

null set symbol

Number
A number represents the value or quantity of something... Like how much money you have... Or how many marbles you have... Or how tall you are.

Number Line
A number line is an infinitely long line whose points match up with the real number system.

Numerals
A numeral is a symbol that represents a number.

Numerator
A numerator is the top number in a fraction.

For more info, check out my lessons on fractions.

no
J's

no
X's

no
Y's

no
Z's

.....::::::::::::::: HELP SUPPORT COOLMATH :::::::::::::::.....
::::::: link to us ::::::: advertise with us :::::::

|| about us || safe surfing || privacy policy || terms of use || copyrights & fair use ||

|| math || math for ages 13-100 || math for kids || math for teachers || math for parents || math games || algebra ||

|| math help lessons || math practice problems || online math dictionary || algebra books || math anxiety ||

|| science || free online games and puzzles || continuing teacher education ||