What is the opposite number of 20?

Multiply 20 by -1

-1 * 20

Since 20 is positive:

the opposite must be negative

Opposite of 20 = -(20) = **-20**

Opposite of 20 = -(20) = **-20**

Free Opposite Numbers Calculator - Given a positive or negative integer (n), this calculates the opposite number of n

This calculator has 1 input.

This calculator has 1 input.

Opposite of a positive number a = -1*a = -a

Opposite of a negative number -1 = -1 * -a = a

For more math formulas, check out our Formula Dossier

Opposite of a negative number -1 = -1 * -a = a

For more math formulas, check out our Formula Dossier

- integer
- a whole number; a number that is not a fraction

...,-5,-4,-3,-2,-1,0,1,2,3,4,5,... - negative
- numbers or values less than 0
- number
- an arithmetical value, expressed by a word, symbol, or figure, representing a particular quantity and used in counting and making calculations and for showing order in a series or for identification. A quantity or amount.
- number line
- a line on which numbers are marked at intervals, used to order numbers. Smaller numbers are on the left and larger numbers are on the right.
- opposite
- diametrically different; of a contrary kind.
- opposite numbers
- A number on the other side of the number line, with the same distance from zero
- positive
- numbers or values greater than 0

Add This Calculator To Your Website