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      The numbers have the same sign, so the answer is positive: .

      The chapter quiz in the next section tests you on your skills working with negative numbers.

Whaddya Know? Chapter 4 Quiz

      In the 26 quiz questions that follow, evaluate by performing the operations as indicated.

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Answers to Chapter 4 Quiz

      1 −1. Find the difference; the answer is negative because 9 is farther from 0 than 8 on the number line: .

      2 6. Drop the negative sign: .

      3 −4. Find the difference; the answer is negative because 6 is farther from 0 than 2 on the number line: .

      4 −15. The signs are the same, so drop the negative signs and find the sum. The answer is negative: .

      5 30. Drop the negative signs and multiply. The product is positive, because the signs are the same: .

      6 −5. Drop the negative sign and divide. The answer is negative, because the signs are different: .

      7 −1. Change the subtraction to addition and the negative 6 to +6. Then find the difference. The answer is negative, because the newly adjusted signs are different and 7 is farther from 0 than 6 on the number line: .

      8 4. Find the difference. The result is positive, so applying the absolute value keeps it a positive answer: .

      9 10. Find the difference, because the signs are different. The answer is positive, because 19 is farther from 0 on the number line: .

      10 5. Drop the negative signs and divide. The answer is positive, because the signs are the same: .

      11 0. Change the subtraction to addition and the second −1 to +1. Then find the difference: .

      12 9. First, find the difference of the numbers in the absolute value symbols. The sign of the difference is negative because 13 is farther from 0 than 4 on the number line. Evaluating the absolute value gives you a positive result:

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