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五年级数学下册3长方体和正方体长方体和正方体的认识补充习题新人教版.doc

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1长方体和正方体长方体和正方体的认识小红为妈妈准备了一件生日礼物，下图是这件礼物的包装盒，长、宽、高分别是15cm、15 cm、8 cm。现在用彩带把这个包装盒捆上，接头处长 18 cm。一共需要多少厘米彩带？答案提示：1548418110（cm）答：一共需要 110 厘米彩带。解题思路：先求出捆扎处的棱长总和，再加上接头处的长度。2

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