3+7+54{#blank#}1{#/blank#}65         67-8-50{#blank#}2{#/blank#}9       38+（46+4）{#blank#}3{#/blank#}78

83-(27-20){#blank#}4{#/blank#}78      43-(13+7){#blank#}5{#/blank#}20     9+（16-8）{#blank#}6{#/blank#}19

{#blank#}1{#/blank#}-6<12          55>{#blank#}2{#/blank#}+10          19>20-{#blank#}3{#/blank#}

76{#blank#}4{#/blank#}67           46-10{#blank#}5{#/blank#}46-9       86+8{#blank#}6{#/blank#}8+86

90-20{#blank#}1{#/blank#}75-5                      74-3{#blank#}2{#/blank#}100-20                           30+40{#blank#}3{#/blank#}84-1

48-3{#blank#}4{#/blank#}8+21                       35+4{#blank#}5{#/blank#}90-60                            46+3{#blank#}6{#/blank#}80-50

80-40{#blank#}7{#/blank#}42+7                         6+52{#blank#}8{#/blank#}57-6                               94-2{#blank#}9{#/blank#}60+30