        2.         ⑴            ⑵       +      +    ⑶       +    ⑷      +    ⑸      +    ⑹       +              7        6×7 = 42                                        7       38                                         38                           ⑴          190  ①      38×3 = 114                           ②        38×1 =38  ③        38×1 =38  ⑵         380   ①       38×2 =76                   ②      38×4 =152                                      ③        38×2 =76                    ④       38×2 =76                  ⑶        38×12 = 456                                                                                                                                   ⑷        3496           7×38 = 266   ①       ②        ③        ④       ⑤          ⑥         ⑦                                                  ⑴     7×38 = 266                                                                   ⑵            2×38 = 76   ⑶      4×38 = 152   ①         ②                                      ⑷      ①   +      24 ×38 = 912   +         +         +          +          +          +         +         +          +          +          +       +        +         +          +          +           +        +         +          +           +           +          +       +        +         +          +          +          +       +        +         +          +          +         ②   +      6×38 = 228                                                                   ③   +   +      24×38 = 912     +   +                           +   +         18×38 = 684                                                                               38              3496                                                4560         3.             6                              +             +                                                   +                                        5                          7×5 = 35                                                                                                                       5        10         12          7              67       7         2       4        54                   7             5 + 10 + + 12 + 7 + 67 ×7 = 707                                                        5×7 = 35         5                  5 + 10 + + 12 + 7 + 67 ×5×7 =3535                                                  4312                                                                               8998                 798         4560         4312                        18658                                         1944                                                