要制作1个长方体的灯箱框架，它的长是10分米，宽6分米，高4分米。做成2个这样的灯箱框架需要多少分米的角铁？
直接写出得数．×= 1÷=×= 77：63=÷9=×=÷8= 4：2.5=×=
×= 0×=÷====
直接写出得数×3=×16=×=（+）×4=×+×=+=÷3= 4÷=
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×1= 52﹣42= 0.75﹣0.5=×=÷= 125×0.08= 0.5+0.02=÷=÷= 0.15×6= 12÷0.3= 0÷=
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= 1÷
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= 77：63=
÷9=
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÷8= 4：2.5=
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×3=
×16=
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×
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÷3= 4÷
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×1= 52﹣42= 0.75﹣0.5=
=
÷
= 125×0.08=
÷
= 0.15×6= 12÷0.3= 0÷
=