Tính

4 x 4 + 29 = 16 + 29                                  20 : 4 x 3 = 5  x  3

                 =     45                                                       =   15

3 : 3 x 0    =  1 x 0                                      25 : 5 x 1 =  5 x 1

                           =      0                                                         =     5