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Question 43

What is the value of -17 + 17?

  1. 0, because the two moves cancel exactlyCorrect answer
  2. 34, adding the two magnitudes
  3. -34, keeping the sign of the leading term
  4. 17, the magnitude the two terms share

Explanation

The two addends are opposites, each exactly the amount that undoes the other, so nothing is left once they are combined. A total of 34 adds the two sizes and overlooks that one addend reverses the other rather than joining it.

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Question 43: What is the value of -17 + 17? · Integers and Negative Numbers · Questena