1. Fractions LCD August 21, 2012
Objective: find Least Common Denominators and
add or subtract fractions
Warm Up
Simplify
8 * 3 ‐ 5 + ‐ 7 ‐36 ÷ ‐ 4
Aug 13­7:53 PM
Skills Workshop 8 & 9 #7­21 odd 1

2. Fractions LCD August 21, 2012
11 ÷ 2
5 3
Aug 25­1:44 PM
Skills Workshop 8 & 9 #7­21 odd 2

3. Fractions LCD August 21, 2012
Skills Workshop 7
# 7 ‐ 17 all
Aug 25­1:45 PM
Skills Workshop 8 & 9 #7­21 odd 3

4. Fractions LCD August 21, 2012
Skills Workshop 7 Answer Key
7. 3/4 13. 2 1/10
8. 1 1/3 14. 10/21
9. 1 1/5 15. 13 31/35
10. 1 2/3 16. 1
11. 2 7/10 17. 2 1/6
12. 3 2/3
Aug 20­11:19 AM
Skills Workshop 8 & 9 #7­21 odd 4

5. Fractions LCD August 21, 2012
Rewrite the fractions with common demonimators
,
1 3 3 2,
4 12 7 3
Aug 13­7:54 PM
Skills Workshop 8 & 9 #7­21 odd 5

6. Fractions LCD August 21, 2012
Adding or Subtracting Fractions ‐‐ You must have the same denominator
Number on the bottom of the fraction
3 1 1 2 4
7
+2
7 6 + 2 5 7
Aug 13­7:57 PM
Skills Workshop 8 & 9 #7­21 odd 6

7. Fractions LCD August 21, 2012
9 1 1 1
11 2 2 8
2 3
3 7
Aug 13­7:57 PM
Skills Workshop 8 & 9 #7­21 odd 7

8. Fractions LCD August 21, 2012
Mixed Numbers verses Improper Fractions
2 1
33 + 4 2
Aug 23­4:20 PM
Skills Workshop 8 & 9 #7­21 odd 8

9. Fractions LCD August 21, 2012
5 1 ­ 1 3
2 5
Aug 23­4:20 PM
Skills Workshop 8 & 9 #7­21 odd 9

10. Fractions LCD August 21, 2012
Skills Workshop 8 + 9
#7 ‐ 21 odd both pages
Show work ‐ changing to LCD
Aug 13­8:01 PM
Skills Workshop 8 & 9 #7­21 odd 10