12-7=      6+5=        5×2=        5×5=      2×4+5=

3×5=       4×2=       4×4=        1×5=      4×5+7=

80-8=      72-50=      9+48=      38-3=      3×4-8=

5×9=        4×8=        23+7=        9×9-9=

7×2=        6+6=        64-20=        6×7+10=

1×8=        2×3=        9×7=          4×3-5=

5×6{#blank#}1{#/blank#}6×5          16{#blank#}2{#/blank#}3×7           6＋7{#blank#}3{#/blank#}6×7

4×8＋4{#blank#}4{#/blank#}36       7×8{#blank#}5{#/blank#}9×6