资源描述
单击此处编辑母版标题样式,单击此处编辑母版文本样式,二级,三级,四级,五级,2023/5/29,#,3,包装扑克,冀教版五年级下册,当朋友要过生日了,你们一般都会送生日礼物,但你在送生日礼物时,为了体现礼物的神秘性,一般都要对生日礼物进行一番包装,使礼物更好看。在对礼物进行包装时,我们会用到数学的哪些知识?还可以解决什么问题呢?,要把,6,盒扑克包装在一起,可以怎样摆放?,扑克,扑克,扑克,扑克,扑克,扑克,活动准备:,1.,材料准备:每组准备扑克,6,盒,包装纸若干。,2.,小组分工,(,参考分工,),:每组,4,人以上,有拼摆员,记录员,测量员,计算员等。,1,2,3,4,活动,1,包装,6,盒扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,方案一 摆一层,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,方案二 摆两层,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,方案三 摆三层,扑克,扑克,扑克,扑克,扑克,扑克,方案四 摆六层,估计一下哪种包装方式更省包装纸。,浪费纸,并且不易包装,根据经验我们知道,重叠的表面积越大,露出来的表面积就越小,越节省包装纸。,实际测量一下哪种包装用纸最少。,包装,8,盒扑克,哪种包装方式更省包装纸?,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,活动准备:,1.,材料准备:每组准备扑克,8,盒,包装纸若干。,2.,小组分工,(,参考分工,),:每组,4,人以上,有拼摆员,记录员,测量员,计算员等。,1,2,3,4,活动,2,包装,8,盒扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,方案一 摆一层,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,方案二 摆两层,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,方案三 摆四层,扑克,扑克,扑克,扑克,扑克,扑克,扑克,扑克,方案四 摆八层,估计一下哪种包装方式更省包装纸。,实际测量一下哪种包装用纸最少。,活动总结,:,通过计算可以得出,重叠的面越大,越多时,拼成的长方体或正方体的表面积就越小,也就越省包装纸。,课堂小结,通过本次包装设计,你有什么发现?,物体重合的面积越大,表面积就越小,包装用的纸也就越少。长方体的表面积与它的长、宽、高的长度有关,在所有物体大小、数量相同的情况下,拼成的长方体长、宽、高的长度越接近,表面积就越小,当长、宽、高相等时,它的表面积最小。,
展开阅读全文