0.8平方千米= 公顷．
× = ×1=× =0.3× =+ =﹣ ．
小红在做一个数乘以36时，误将6看成9，将3看成5，结果得1239，正确的结果应该是 ．
请把改写成两道除法算式． ÷ = ； ÷ = ．
× = ×= += = ．
除法的验算可用 ．
× = ×1
=
× =0.3× =
+ =
﹣ ．
改写成两道除法算式．
× = ×
= +
= = ．
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