Q:

# What is a number to the negative 1 power?

A:

A number to the power of negative one is equal to one over that number. For example, five to the negative one power equals one over five, or 1/5.

## Keep Learning

Credit: Hill Street Studios Blend Images Getty Images

The negative exponent rule says that when doing calculations with negative exponents, any negative exponents in the top half of a fraction get moved to the bottom half and become positive exponents. This works for any negative power, not only the power of one. For example, to calculate five to the negative two power, first move the expression to the denominator and make it positive. This gives one over five to the positive two power, which is equal to 1/25.

The reverse is also true. Negative exponents in the denominator of a fraction get moved up to the numerator and become positive exponents.

Sources:

## Related Questions

• A: A number is in exponential form if it is given in the form A^b, where A is called the base and b is the power or exponent. To express a number written in e... Full Answer >
Filed Under:
• A: The factors of 20 are one, two, four, five, 10, 20, negative one, negative two, negative four, negative five, -10 and -20. The prime factors of 20 are two,... Full Answer >
Filed Under:
• A: The Drexel University Math Forum advises that no one "invented" the radical sign as it exists today. Instead, it evolved over time, originating from a Germ... Full Answer >
Filed Under:
• A: The complement is all the other answers besides the one that is wanted , which is known as the event. Together, the event and complement cover all possible... Full Answer >
Filed Under:
PEOPLE SEARCH FOR