Page 90 - บทที่ 1
P. 90

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                                                 8x2 =                            8 - 5 =
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                 2x5 =                           6 - 5 =                          4 + 1 =


                 9 - 1 =                         1 + 0 =                          1x9 =



                 4 + 2 =                         5 - 3 =                        11 - 6 =



                 3x2 =                            7x7 =                           9 + 3 =


                 2 + 9 =                       15 - 7 =                           5x8 =



                 7 - 4 =                         3 + 4 =                          4 - 1 =


               12 - 3 =                          8 + 9 =                          9x8 =



                 7x8 =                           9 - 8 =                          8 + 1 =



               10 - 4 =                           3x1 =                         14 - 7 =


                 8 + 4 =                       13 - 6 =                           7 + 7 =



                 5 + 5 =                          6x6 =                           9x2 =


                 9x6 =                            3 + 7 =                         5 + 3 =



                 3 + 3 =                        10 - 9 =                        12 - 6        =



                 5x6 =                            9 + 5 =                          3x3 =


                 0x7 =                          15 - 9 =                          5 + 7       =



                 8 + 5 =                          4x3 =                         10 - 6        =


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