53+8={#blank#}1{#/blank#}  5×6={#blank#}2{#/blank#}  4×5={#blank#}3{#/blank#}  86-20={#blank#}4{#/blank#}    {#blank#}5{#/blank#}×4=24

4×4={#blank#}6{#/blank#}  3×3={#blank#}7{#/blank#}  4×3={#blank#}8{#/blank#}  5×5={#blank#}9{#/blank#}   3×{#blank#}10{#/blank#}=12

36÷6={#blank#}1{#/blank#}因为{#blank#}2{#/blank#}×6=36

18÷6={#blank#}3{#/blank#}因为{#blank#}4{#/blank#}×6=18

4×4=         6×5=          4×5=          86-20=

36÷6=        3÷3=          20-4=         75-8=

3×5=         12÷4=         4×2=          24+6=

6×3-6=       5×4+5=       2×3-2=        （  ）×4=24