Unknown Number Calculator

Enter Unknown Number Equation


How does the Unknown Number Calculator work?

Determines the unknown number needed to make an equation true.
This calculator has 1 input.

What 6 concepts are covered in the Unknown Number Calculator?

To bring two or more numbers (or things) together to make a new total
a statement declaring two mathematical expressions are equal
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.
to take away from a group or a number of things
a number or value we do not know
unknown number
Also known as a variable

Example calculations for the Unknown Number Calculator

  1. 9+?=12
  2. 12=5+?
  3. 12=9 - ?