Interpret absolute value as distance and use it to compare quantities and errors.
Evaluate an absolute value
Problem
What is the value of \(|-7|\)?
Big Picture
What this problem is really about
Absolute value asks for distance from zero, not the signed direction of the original number. Picture negative seven on the number line and count the units between it and zero. Since distance cannot be negative, report that nonnegative count rather than copying the sign inside the bars.
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