Page 28 - เอกสารประกอบการเรียนคณิตศาสตร์
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5.           25  +  20             =      _________________


                                                         =      _________   =   ________



                      6.           44  +  22             =      _________________


                                                         =      _________   =   ________




                     7.            30  +  24             =      _________________

                                                         =      _________   =   ________












                      8.           28  +  41             =      _________________
                                                         =      _________   =   ________





                      9.           33  +  26             =      _________________
                                                         =      _________   =   ________





                      10.          17  +  51             =      _________________
                                                         =      _________   =   ________
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