2 + 2 = 5 - Wikipedia 2 + 2 = 5 or two plus two equals five is a mathematical falsehood which is used as an example of a simple logical error that is obvious to anyone familiar with basic arithmetic
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Calculator - Math is Fun Just type and your answer comes up live Use the buttons, or type formulas like 3sqrt(2) or pi 2 Also see Function Grapher, Equation Grapher,
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