已知：148×23＝3404，

那么：1.48×23＝{#blank#}1{#/blank#}，148×2.3＝{#blank#}2{#/blank#}，0.148×23＝{#blank#}3{#/blank#}，

14.8×2.3＝{#blank#}4{#/blank#}，1.48×0.23＝{#blank#}5{#/blank#}，0.148×0.23＝{#blank#}6{#/blank#}．

99×99=9801             99999×99999={#blank#}1{#/blank#}

999×999=998001         999999×99999={#blank#}2{#/blank#}

9999×9999=99980001     9999999×9999999={#blank#}3{#/blank#}

0.46×39={#blank#}1{#/blank#}    4.6×{#blank#}2{#/blank#}=1.794

○

3.17×0.625○0.317×6.25

36.2×0.92○36.2

7.8÷1.2○0.78÷0.12

{#blank#}1{#/blank#}×{#blank#}2{#/blank#}=3000

{#blank#}3{#/blank#}×{#blank#}4{#/blank#}=3000

{#blank#}5{#/blank#}×{#blank#}6{#/blank#}=3000

{#blank#}7{#/blank#}×{#blank#}8{#/blank#}=3000