Page 75 - Math Course 1 (Book 1)
P. 75

Like Fractions





                Your Turn!                                       MO. 2 - L4b


               Adding Like Fractions

                 Find  2  +  8  Write the sum in simplest form.  Subtracting Like Fractions
                       9    9
                 A.   5
                      9                                          Key Concept

                      1
                 B. 1
                      9                                          Subtracting Like Fractions

                 C. 1  2                                         Words To subtract fractions with like denomina-
                      9                                                 tors, subtract the numerators and write
                                                                        the difference over the denominator.
                      7
                 D. 1
                      9                                                    a    b    a - b
                                                                 Symbol       -   =      , where c = 0
                                                                           c    c     c
                  Answer
                                                                            5   1    5 - 1   4
                                                                 Example      -   =       or
                                                                            7   7     7      7
               Add Mixed Numbers
                        3     5
                 Find 5   +2     Write the product in simplest
                        14   14
                                 form.
                      1                                                     Let’s Begin
                 A. 3
                     14

                      8
                 B. 7
                     14                                           Subtract Fractions
                      4
                 C. 7
                      7                                           Example

                 D. 8  1
                     14                                            Find   11  -   5  Write the difference in simplest
                                                                   form.  12  12
                  Answer
                                                                   Estimate 1-  1  =   1
                                                                               2    2
               Add Algebraic Fractions                                    11  -  5  =   11- 5  The denominators are
                        3x    5x                                          12   12    12    the same. Subtract the
                 Find       +    Write the sum in simplest form.
                        16   16                                                            numerators.
                     x²
                 A.
                      2                                                              6    1
                                                                      Answer       =  12  or  2  Simplify.
                      x
                 B.
                      2
                      x
                 C.
                      4

                 D.  -  x
                      8

                  Answer

                                                                                                                 67
   70   71   72   73   74   75   76   77   78   79   80