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

{#blank#}1{#/blank#}×9＜30    {#blank#}2{#/blank#}×9＜70

6{#blank#}1{#/blank#}7=13     8{#blank#}2{#/blank#}6=48      35{#blank#}3{#/blank#}5=7     48{#blank#}4{#/blank#}8=40

12{#blank#}5{#/blank#}3=4     9{#blank#}6{#/blank#}5=45      27{#blank#}7{#/blank#}9=3     54{#blank#}8{#/blank#}6=9

9×817    3×972

4×832    6×64×9

6×{#blank#}1{#/blank#}>35                 7×{#blank#}2{#/blank#}>50           {#blank#}3{#/blank#}×5>42