4个2相加                                            2×4=8

6+6+6                       4×2                  5乘4

4 + 4+4 +4 +4           6×3                 乘数是6和3

3+3+3+3+3+3           5×4                 2+2+2+2

5 +5 + 5 +5                                        3×6

2乘4                                                    4×5

4 × 1 =        3 × 2 =         6 × 2 =        1 × 8 =

4 + 1 =          3 + 2 =           6 + 2 =          1 + 8 =

12÷3={#blank#}3{#/blank#}，口诀：{#blank#}4{#/blank#}。