розв039;яжи з поясненням двома методами 32-15=   94-56=   81-24=  28-19=45-18=

32-15=17                                              94-56=38                       81-24=57             
17+15=32                                             38+56=94                      57+24=81
32-17=15                                              94-38=56                        81-57=24             
        



28-19=9                            45-18=27
9+19=28                           27+18=45
28-9=19                            45-27=18