× {#blank#}1{#/blank#} 

× {#blank#}2{#/blank#} 

÷ {#blank#}3{#/blank#} 

25÷ {#blank#}4{#/blank#}25×5．

尽可能灵活地计算．

1801.6÷32={#blank#}1{#/blank#}

1.8016÷32={#blank#}2{#/blank#}

180.16÷32={#blank#}3{#/blank#}

18.016÷32={#blank#}4{#/blank#}

7.19÷0.98{#blank#}1{#/blank#}7.19      26.7÷1.02{#blank#}2{#/blank#}26.7     1.48×1.2{#blank#}3{#/blank#}1.48 

0.46÷0.46{#blank#}4{#/blank#}0.46     3.2×0.8{#blank#}5{#/blank#}3.2         0.99÷0.9{#blank#}6{#/blank#}1 

0.99×0.99{#blank#}7{#/blank#}0.99÷0.99                 3.56÷1{#blank#}8{#/blank#}3.56×1

上面两种思考过程，正确的是( )。