A number is a count or measurement that is really an idea in our minds. We write or talk about numbers using numerals such as 4 or four.

Illustrated definition of Number: A count, measurement or idea of a value. We write or talk about numbers using numerals such as 5 or five....

I want to take you on an adventure ... an adventure through the world of numbers. Let us start at the beginning:

Imagine mathematics without fractions or decimals. We only have integers, which are whole numbers, their negatives, and zero:

See Number Names to 100 Table. See Counting to 1,000 and Beyond. For beginners, try Counting Bugs, Finding Bugs and the Kindergarten Worksheets.

A Binary Number is made up of only 0s and 1s. There is no 2, 3, 4, 5, 6, 7, 8 or 9 in Binary. Binary numbers have many uses in mathematics and beyond.

Whole Numbers are simply the numbers 0, 1, 2, 3, 4, 5, ... (and so on) ... No Fractions ... (But numbers like , 1.1 and 5 are not whole numbers.)

Math explained in easy language, plus puzzles, games, quizzes, worksheets and a forum. For K-12 kids, teachers and parents.

Writing numbers on a Number Line makes it easy to tell which numbers are greater or lesser. A number on the left is less than a number on the right.

Real Numbers are just numbers like ... In fact ... Nearly any number you can think of is a Real Number ... Real Numbers can also be positive, negative or zero.