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3   Find the difference.


              (a)      623 – 257                (b)      257 – 76                  (c)      809 – 517

                         H      T      O                    H      T     O                    H      T      O




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              4   Choose and write the correct answer.


              (a)  125 – 25  =                                100  or  120  or  105



              (b)  320 – 110  =                               120  or  210  or  200


              (c)  253 – 242  =                               111  or  211  or  11



              (d)  968 – 708  =                               260  or  268  or  208



              5   Subtract and check.

              (a)      383 – 25                 (b)      766 – 208                 (c)      542 – 357


                         H      T      O                    H      T     O                    H      T      O




                    –                                 –                                  –






                     Checking                          Checking                           Checking

                         H      T      O                    H      T     O                    H      T      O




                    +                                 +                                  +









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