三七{#blank#}1{#/blank#}         二{#blank#}2{#/blank#}十八

{#blank#}3{#/blank#}三十六       四七{#blank#}4{#/blank#}

二五{#blank#}5{#/blank#}         {#blank#}6{#/blank#}十二

{#blank#}7{#/blank#}十六          六六{#blank#}8{#/blank#}

三六{#blank#}9{#/blank#}             {#blank#}10{#/blank#}二十五

①

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

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

②

{#blank#}7{#/blank#}×{#blank#}8{#/blank#}={#blank#}9{#/blank#}

{#blank#}10{#/blank#}×{#blank#}11{#/blank#}={#blank#}12{#/blank#}

4×4=       5×3=       2×7=        4×8=       3×7=

3×5=       5×6=       2×9=        1×5=       4×5=

7×□=42          6×9=7×9-□

□+8=56          7×8=□×7+7

□×7=28          8×□=4×□

8+8+4+4+4+4+4+4=4×□=8×□=□