例:3×3=2×4+1
5×5=8×3+1
6{#blank#}1{#/blank#}12÷6 5÷5{#blank#}2{#/blank#}5-5 67-29-12{#blank#}3{#/blank#}67-(29+12)
3+3{#blank#}4{#/blank#}3×3 3×6{#blank#}5{#/blank#}9+9 7×9-15{#blank#}6{#/blank#}8×8-15