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The absolute value of a number is a measure of the size of that number. The absolute value of <math>x</math> is written <math>|x|</math>.
The '''absolute value''' of a number is a measure of the size of that number. The absolute value of <math>x</math> is written <math>|x|</math>.
:If <math>x</math> is a positive number, then <math>|x| = x</math>.
:If <math>x</math> is a positive number, then <math>|x| = x</math>.