0.34-0.259{#blank#}1{#/blank#}0.43-0.259      8.7-5.19{#blank#}2{#/blank#}10.2-5.19

81.3-2.64{#blank#}3{#/blank#}31.8+28.9       8.35+7.29{#blank#}4{#/blank#}7.29+8.35

0.14＋0.16={#blank#}1{#/blank#}              8.09－7.29={#blank#}2{#/blank#}

{#blank#}1{#/blank#}个0.01减去{#blank#}2{#/blank#}个0.01是{#blank#}3{#/blank#}个0.01，所以百分位上是{#blank#}4{#/blank#}；

{#blank#}5{#/blank#}个0.1减去{#blank#}6{#/blank#}个0.1是{#blank#}7{#/blank#}个0.1，所以十分位上是{#blank#}8{#/blank#}；

{#blank#}9{#/blank#}个1减去{#blank#}10{#/blank#}个1是{#blank#}11{#/blank#}个1，所以个位上是{#blank#}12{#/blank#}。

0.8+0.88=1.68

0.8+0.88+0.888=2.568

0.8+0.88+0.888+0.8888=3.4568

0.8+0.88+0.888+0.8888+0.88888={#blank#}1{#/blank#}

0.8+0.88+0.888+0.8888+0.88888+0.888888={#blank#}2{#/blank#}