光华街口装了一个新的铁皮邮箱,长50cm,宽40cm,高70cm.做这个邮箱至少需要多少平方厘米的铁皮?_百度作业帮
光华街口装了一个新的铁皮邮箱,长50cm,宽40cm,高70cm.做这个邮箱至少需要多少平方厘米的铁皮?
(50×40+50×70+40×70)×2=(00)×2=8300×2=16600(平方厘米)答:做这个邮箱至少需要16600平方厘米的铁皮.
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