6×7{#blank#}1{#/blank#}41         4×7{#blank#}2{#/blank#}30       7×7{#blank#}3{#/blank#}49

7+1{#blank#}4{#/blank#}7×1        7×3{#blank#}5{#/blank#}20       7×4{#blank#}6{#/blank#}4×7

6×6{#blank#}1{#/blank#}6×2        5×5{#blank#}2{#/blank#}5+5         7+7+7{#blank#}3{#/blank#}7×3

2×2{#blank#}4{#/blank#}2+2         4×8{#blank#}5{#/blank#}8×4        8×9-9{#blank#}6{#/blank#}8×8

8×{#blank#}1{#/blank#}<33          {#blank#}2{#/blank#}×8<20            {#blank#}3{#/blank#}×7<59         6×{#blank#}4{#/blank#}＜43

列式计算：