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10.5 Addition and Subtraction with unlike denominators Steps: 1.Find a least common denominator (LCD) 2.Rename fractions 3.Add or subtract numerators.

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Presentation on theme: "10.5 Addition and Subtraction with unlike denominators Steps: 1.Find a least common denominator (LCD) 2.Rename fractions 3.Add or subtract numerators."— Presentation transcript:

1 10.5 Addition and Subtraction with unlike denominators Steps: 1.Find a least common denominator (LCD) 2.Rename fractions 3.Add or subtract numerators

2 REVIEW:

3 How to get a LCD with RE 1.Factor the denominators 2.Take one of each factor –If there are duplicates take the one with the highest exponent

4 Rename Fractions with LCD Compare the LCD to the denominator of each fraction Multiply the numerator and denominator of the fraction by a number or polynomial to make your denominator match your LCD

5 Example 1

6 Example 2:

7 Example 3:

8 Example 4:

9 Example 5:

10 Example 6:

11 Example 7 You try! Raise your hand when you are done! First person done with the correct answer will earn a math buck!$$$

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13 Example 8 You try! Raise your hand when you are done! First person done with the correct answer will earn a math buck!$$$

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15 Example 9 You try! Raise your hand when you are done! First person done with the correct answer will earn a math buck!$$$

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17 Example 10 You try! Raise your hand when you are done! First person done with the correct answer will earn a math buck!$$$

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19 Example 11 You try! Raise your hand when you are done! First person done with the correct answer will earn a math buck!$$$

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21 Assignment: Page 448 (2-34) even


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