3×4      一二得二      3×2

2×3      一四得四      1×4

1×2      二二得四      4×4

4×3      二三得六      4×1

2×2      三三得九      3×3

2×1      三四十二      1×4

四四十六

3＋3＋3＋3={#blank#}1{#/blank#}×{#blank#}2{#/blank#}={#blank#}3{#/blank#}

{#blank#}1{#/blank#}×{#blank#}2{#/blank#}={#blank#}3{#/blank#}(元)

6×{#blank#}1{#/blank#}=18      {#blank#}2{#/blank#}×5=20     {#blank#}3{#/blank#}÷6=5

12÷{#blank#}4{#/blank#}=2      {#blank#}5{#/blank#}÷3=4      16÷{#blank#}6{#/blank#}=4

3+3+3+3={#blank#}1{#/blank#}×{#blank#}2{#/blank#}={#blank#}3{#/blank#}

1+1+1+1+1={#blank#}4{#/blank#}×{#blank#}5{#/blank#}={#blank#}6{#/blank#}