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Question 31

A worked solution evaluates |-3 + 8| as 11 by taking the absolute value of -3 before adding. What is the correct value?

  1. 8
  2. 3
  3. 5Bonne réponse
  4. -11

Explication

Everything between the bars is combined first, and adding 8 to -3 leaves a positive result five steps from zero. Applying the bars to -3 on its own rewrites the expression before it has been worked out and turns a partly cancelling sum into a growing one, while dropping the -3 altogether reports the 8 and combining both terms under one minus sign reports -11.

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Question 31: A worked solution evaluates |-3 + 8| as 11 by taking the… · Integers and Negative Numbers · Questena