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Adding and Subtracting Fractions

Chapter 3. Adding and Subtracting Fractions. Adding and Subtracting Like Fractions. 3.1. Adding Like Fractions. Fractions with the same denominator are called like fractions . Fractions that have different denominators are called unlike fractions. Adding Like Fractions.

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Adding and Subtracting Fractions

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  1. Chapter 3 Adding and Subtracting Fractions

  2. Adding and Subtracting Like Fractions 3.1

  3. Adding Like Fractions Fractions with the same denominator are called like fractions. Fractions that have different denominators are called unlike fractions.

  4. Adding Like Fractions Adding Like Fractions (Fractions with the Same Denominator) To add like fractions, add the numerators and write the sum over the common denominator. If a, b, and c represent nonzero whole numbers, we have + =

  5. Examples Add and simplify. a. b.

  6. Adding Like Fractions P 175 Elayn Martin-Gay, PEARSON PRENTICE HALL, BASIC COLLEGE MATHEMATICS, 3e – Slide #17

  7. Subtracting Like Fractions Subtracting Like Fractions (Fractions with the Same Denominator) To subtract like fractions, subtract the numerators and write the difference over the common denominator. If a, b, and c represent nonzero whole numbers, then - =

  8. Examples Subtract and simplify. a. b.

  9. Subtracting Like Fractions P 175 Elayn Martin-Gay, PEARSON PRENTICE HALL, BASIC COLLEGE MATHEMATICS, 3e – Slide #17

  10. Solving Problems by Adding or Subtracting Like Fractions Rectangle Find the perimeter of the following rectangle. Perimeter

  11. Solving Problems by Adding or Subtracting Like Fractions A jogger ran 13/4 miles on Monday and 7/4 miles on Wednesday. How much farther did he run on Monday than on Wednesday? P 176-177 Elayn Martin-Gay, PEARSON PRENTICE HALL, BASIC COLLEGE MATHEMATICS, 3e – Slide #17

  12. Example A recipe calls for 1/3 of a cup of brown sugar and 2/3 of a cup of white sugar. How much total sugar is in the recipe? Total sugar = brown sugar + white sugar The total amount of sugar needed in the recipe is 1 cup.

  13. DONE

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