3.5÷2.1{#blank#}1{#/blank#}3.5         9.2÷0.15{#blank#}2{#/blank#}9.2÷1.5      5.4÷0.99{#blank#}3{#/blank#}5.4

4.8÷0.8{#blank#}4{#/blank#}4.8×0.8     0.808080…{#blank#}5{#/blank#}       2.14÷1.5{#blank#}6{#/blank#}2.14×1.5

2.717171…{#blank#}7{#/blank#}      3.25÷0.01{#blank#}8{#/blank#}3.25×100

0.99×25{#blank#}1{#/blank#}25       46÷0.8{#blank#}2{#/blank#}46        5.3﹣ {#blank#}3{#/blank#}4.3

1.28×0.92{#blank#}1{#/blank#}1.28        a÷0.2{#blank#}2{#/blank#}a（a≠0）        6.42×3.2{#blank#}3{#/blank#}3.2×6.42

45.6÷2.1=4.56÷{#blank#}1{#/blank#}

{#blank#}2{#/blank#}×0.15=0.32×1.5

280×{#blank#}3{#/blank#}=28×1.6

33.4÷5={#blank#}4{#/blank#}÷0.05