把两个棱长是1厘米的正方体拼成一个长方体，这个长方体的表面积是12平方厘米，体积是2立方厘米． ．
==8÷2==36÷ ．
==18÷ =．
÷40==0.375=9÷ =．
÷5== （填小数）=15÷ ．
8÷ ==0.125= %．
=
=8÷2=
=36÷ ．
=
=18÷ =
．
=0.375=9÷ =
．
= （填小数）=15÷ ．
=0.125= %．
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