This is the Number Line: If a number has no sign it usually means that it is a positive number. Example: 5 is really +5.| Math is Fun
Zero shows that there is no amount. ... Example 6 6 = 0 (the difference between six and six is zero)| www.mathsisfun.com
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.)| www.mathsisfun.com