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Fractions With Unlike Denominators

1 3. 1 2. Method 1 Model +. 1 3. Use the fraction model for. 1 2. Use the fraction model for. 1 3. 1 2. 5 6. + =. Fractions With Unlike Denominators. LESSON 5-3. Additional Examples. 1 3. 1 2. Find +. 5 6. 1  2 3  2. 1 3. 2 6.

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Fractions With Unlike Denominators

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  1. 1 3 1 2 Method 1 Model + . 1 3 Use the fraction model for . 1 2 Use the fraction model for . 1 3 1 2 5 6 + = Fractions With Unlike Denominators LESSON 5-3 Additional Examples 1 3 1 2 Find + .

  2. 5 6 1  2 3  2 1 3 2 6 The LCD is 6. Write the fractions with the same denominator. 1 2 3 6 + + 1  3 2  3 Add the numerators. Fractions With Unlike Denominators LESSON 5-3 Additional Examples (continued) Method 2 Use a common denominator.

  3. 3 5 In Ms. DeMarco’s class, of the students chose cheese as their favorite pizza topping. Pepperoni was chosen by of the students. What fraction of the students chose either cheese or pepperoni as their favorite pizza topping? 1 3 3  3 5  3 1 3 3 5 Add and to find the fraction of students who chose cheese or pepperoni. 1  5 3  5 3 5 9 15 The LCD is 15. Write the fractions with the same denominator. 1 3 5 15 + + 14 15 Add the numerators. 14 15 The favorite pizza topping of of the students is either cheese or pepperoni. Fractions With Unlike Denominators LESSON 5-3 Additional Examples

  4. 5 8 1 6 Method 1 Model – . 5 8 Use the fraction model for . 1 6 Use the fraction model for . 5 8 1 6 11 24 – = Fractions With Unlike Denominators LESSON 5-3 Additional Examples 5 8 1 6 Find – .

  5. 5  3 8  3 5 8 The LCD is 24. Write the fractions with the same denominator. 1 6 – – 1  4 6  4 Subtract the numerators. 11 24 4 24 15 24 Fractions With Unlike Denominators LESSON 5-3 Additional Examples (continued) Method 2 Use a common denominator.

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