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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
Fractions LCD                                      August 21, 2012




         11 ÷ 2
          5   3




                                  Aug 25­1:44 PM

Skills Workshop 8 & 9 #7­21 odd                                      2
Fractions LCD                                      August 21, 2012




     Skills Workshop 7
     # 7 ‐ 17 all




                                  Aug 25­1:45 PM

Skills Workshop 8 & 9 #7­21 odd                                      3
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
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
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
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
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
Fractions LCD                                      August 21, 2012




      5 1 ­            1 3
        2                5




                                  Aug 23­4:20 PM

Skills Workshop 8 & 9 #7­21 odd                                      9
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

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Fraction notes

  • 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