Page 123 - บทที่ 1
P. 123

It':
                                                                                               Quvi     mtu








                               unvt     Qunvt
                                               10 - 6 =                          8x7         =


                 7 X 7                           5 + 2 =                         1 + 6       =


                 6 - 3                           6x7 =                           4x3         =



                 2 + 5                           6 + 4       =                 14 - 9         =


                 7 + 4                           8 - 7       =                   9 + 7        =



                 5 x6                            2x8 =                           9x2          =



                 7 - 1                           7 + 2       =                   2 - 1        =


                 6 x4                          11 - 9        =                   2 + 4        =



               10 - 8 =                          8x5 =                           8 + 3        =



                 6 + 3 =                         6 - 4       =                   7x2          =


                 9x9 =                           4 + 4       =                   3 + 5        =



               13 - 7 =                          2x1         =                 11 - 4         =


                 9 + 9 =                         8 + 4       =                 12 - 7         =



                 4x2 =                           3x8 =                           7 + 6        =



                 8 - 4 =                       15 - 7        =                   5x7          =


               15 - 9 =                          2 + 9       =                 11 - 2         =



                 8 + 8 =                         5x5 =                           3 + 8        =


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