9.5x0.98{#blank#}1{#/blank#}9.5           5.4÷0.98{#blank#}2{#/blank#}5.4

2.25÷0.5{#blank#}3{#/blank#}2.25x0.5       7.8x1{#blank#}4{#/blank#}7.8÷1

3.87÷43{#blank#}1{#/blank#}38.7÷43

52÷4{#blank#}2{#/blank#}5.2÷0.4

25.8÷2{#blank#}3{#/blank#}25.8×0.5

14.2÷1.6{#blank#}4{#/blank#}14.2÷16

我发现：{#blank#}5{#/blank#}

416÷5{#blank#}1{#/blank#}406÷5      18×34{#blank#}2{#/blank#}34×18        423÷8{#blank#}3{#/blank#}631÷9

23×8{#blank#}4{#/blank#}500÷5        12×15{#blank#}5{#/blank#}13×15        420÷6{#blank#}6{#/blank#}420÷2÷3