9+?=12
9+?=12 
+equationa statement declaring two mathematical expressions are equalnumberan 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.subtractto take away from a group or a number of things
-unknowna number or value we do not knowunknown numberAlso known as a variable
Enter Unknown Number Equation
Determine the unknown number below
9 + ? = 12
Isolate the ? symbol
Subtract 9 from each side
9+? - 9 = 12 - 9
9 + 3 = 12
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How does the Unknown Number Calculator work?
Free Unknown Number Calculator - 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?
addTo bring two or more numbers (or things) together to make a new total+equationa statement declaring two mathematical expressions are equalnumberan 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.subtractto take away from a group or a number of things
-unknowna number or value we do not knowunknown numberAlso known as a variable
Example calculations for the Unknown Number Calculator
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