= 123*. * (n-2)* (n. 0 (zero) is a number representing an empty quantity. Check out our complete guide to the number 0 to understand how it works in math. 6 − 6 = 0 (the difference between six and six is zero) it is also used as a placeholder so we can write a numeral properly. (read zero factorial) is defined to equal 1. 502 (five hundred and two) could be mistaken for 52 (fifty two) without the zero in the tens place. Involved answer (s): Example (1) if n! Is defined as the product of all positive integers from 1 to n, then: Is zero a number? Zero zero shows that there is no amount. | mathematics grade 1 | periwinklethis short video on zero will tell you why its important. watch our other videos:english stories for kids:. Adding (or subtracting) 0 to any number leaves that number unchanged; There are several proofs that have been offered to support this common definition. In mathematical terminology, 0 is the additive identity of the integers, rational numbers, real numbers, and complex numbers, as well as other algebraic structures.