Algebra I All-in-One For Dummies. Mary Jane Sterling

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      49 .

       because three digits repeat: .

      50 4.173. The number 7 follows the 2 in the thousandths place. Because 7 is greater than 5, you round up.

      If you’re ready to test your skills a bit more, take the following chapter quiz that incorporates all the chapter topics.

Whaddya Know? Chapter 4 Quiz

      1

      2 Write the fraction as an equivalent fraction with a denominator of 42.

      3 Rewrite the fractions with the least common denominator:

      4 Write the fraction as a decimal:

      5 Solve the proportion for x:

      6 Change the decimal to a fraction in lowest terms: .

      7 Rewrite the fractions with the least common denominator:

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      9 Change the mixed number to an improper fraction.

      10 Simplify the complex fraction:

      11 Write the fraction in lowest terms.

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      13 Change the decimal to a fraction in lowest terms: 0.125

      14 Change the improper fraction to a mixed number.

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Answers to Chapter 4 Quiz

      1 0.1. Multiply the first two numbers; then divide the result by the third.

      2 . Multiply both the numerator and denominator by 6.

      3 . The fractions have no common denominator, so you multiply the first fraction by and the second fraction by .

      4 . Dividing the denominator into the numerator, you get a repeating decimal.

      5 . Both denominators are divisible by 3. Divide to get . The fraction on the right can be reduced by dividing each number by 4. . Now, when you cross-multiply, you have .

      6 . Put the repeating digits, 27, over 99 in a fraction and reduce. .

      7 . Multiply the first fraction by and the second fraction by .

      8 . Multiply the first two fractions. Then divide the result by the third fraction.

      9 . Multiply the whole number 3 times the denominator 4 and add the numerator.

      10 .

11 . Both the numerator and denominator are divisible by 30. Divide and write the results in the corresponding positions.

      12 5.325951. Add the first two numbers and then subtract the third from the result.

      13 . Put 125 over 1,000 in a fraction and reduce.

      14 . Divide 7 into 25. The remainder goes in the numerator.

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