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

6×{#blank#}1{#/blank#}<38           {#blank#}2{#/blank#}×7<30 50>{#blank#}3{#/blank#}×7

9×{#blank#}4{#/blank#}<55          {#blank#}5{#/blank#}×8<43 64>{#blank#}6{#/blank#}×7

6×{#blank#}1{#/blank#}<35       7×{#blank#}2{#/blank#}<30           12+{#blank#}3{#/blank#}

8×{#blank#}4{#/blank#}       {#blank#}5{#/blank#}        {#blank#}6{#/blank#}