# 10.5 Addition and Subtraction with unlike denominators

## Presentation on theme: "10.5 Addition and Subtraction with unlike denominators"— Presentation transcript:

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

REVIEW:

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

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

Example 1

Example 2:

Example 3:

Example 4:

Example 5:

Example 6:

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

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

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

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

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

Assignment: Page 448 (2-34) even