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# Section 5.5

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### Section 5.5

1. 1. How are fractions used and applied in the larger world?
2. 2. Learning Target: Students will learn how to compare and order fractions.
3. 3. You can use models to compare fractions but we are going to focus today on finding a common denominator as a way to compare and order fractions.
4. 4. To find a common denominator you can multiply the two denominators together.
5. 5. EXAMPLE 1 Comparing Fractions Using the LCD Compare 5 6 .7 9 and
6. 6. You can also find the LCM of the two denominators which is called the Least Common Denominator (LCD).
7. 7. EXAMPLE 1 Comparing Fractions Using the LCD Compare 5 6 .7 9 and
8. 8. EXAMPLE 1 Comparing Fractions Using the LCD Compare STEP 1 5 6 .7 9 and
9. 9. EXAMPLE 1 Comparing Fractions Using the LCD Compare STEP 1 Find the LCD: Because the LCM of 6 and 9 is 18, the LCD is 18. 5 6 .7 9 and
10. 10. EXAMPLE 1 Comparing Fractions Using the LCD STEP 2 Compare STEP 1 Find the LCD: Because the LCM of 6 and 9 is 18, the LCD is 18. 5 6 .7 9 and
11. 11. EXAMPLE 1 Comparing Fractions Using the LCD STEP 2 Use the LCD to write equivalent fractions. Compare STEP 1 Find the LCD: Because the LCM of 6 and 9 is 18, the LCD is 18. 5 6 .7 9 and
12. 12. EXAMPLE 1 Comparing Fractions Using the LCD STEP 2 Use the LCD to write equivalent fractions. Compare STEP 1 Find the LCD: Because the LCM of 6 and 9 is 18, the LCD is 18. 5 6 = 5 6 .7 9 and
13. 13. Remember whatever you multiply the numerator by you must do the same to the denominator to keep the fraction equivalent.
14. 14. 1. Copy and complete the statement with <, > or = : GUIDED PRACTICE for Example 1, 2 and 3
15. 15. 3 7 ? 2 5 1. Copy and complete the statement with <, > or = : GUIDED PRACTICE for Example 1, 2 and 3
16. 16. 3 7 ? 2 5 STEP 1 : 1. Copy and complete the statement with <, > or = : GUIDED PRACTICE for Example 1, 2 and 3
17. 17. 3 7 ? 2 5 STEP 1 : Find the LCD : Because the LCM of 7 and 5 is 35, the LCD is 35. 1. Copy and complete the statement with <, > or = : GUIDED PRACTICE for Example 1, 2 and 3
18. 18. 3 7 ? 2 5 STEP 1 : Find the LCD : Because the LCM of 7 and 5 is 35, the LCD is 35. STEP 2 : 1. Copy and complete the statement with <, > or = : GUIDED PRACTICE for Example 1, 2 and 3
19. 19. 3 7 ? 2 5 STEP 1 : Find the LCD : Because the LCM of 7 and 5 is 35, the LCD is 35. STEP 2 : Use the LCD to write equivalent fractions. 1. Copy and complete the statement with <, > or = : GUIDED PRACTICE for Example 1, 2 and 3
20. 20. 3 7 ? 2 5 STEP 1 : Find the LCD : Because the LCM of 7 and 5 is 35, the LCD is 35. STEP 2 : Use the LCD to write equivalent fractions. 1. Copy and complete the statement with <, > or = : GUIDED PRACTICE for Example 1, 2 and 3 3 7 =
21. 21. http://www.mathplayground.com/how to_comparefractions.html Video on comparing and ordering fractions.
22. 22. Can you compare and order fractions using finding common denominators?