N2C7TNp38

 

Answer to Problem 38:

1.  3 – 5 (4 +7)         2. (2 + 7)2                3.  (4 + 6) - 32

      3 – 5 (11)                 (9)2                          (10) - 32

       3 – 55                       81                            10-9

         -52                                                             1