五年级数学下册4.2《体积单位》课件1北师大版.ppt

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1、常见的长度单位有哪些?,常见的面积单位有哪些?,说一说,常见的体积单位有哪些?,说一说,常见的体积单位有哪些?,棱长为1厘米的正方体,体积是1立方厘米,记作1厘米3(cm3);,棱长为1分米的正方体,体积是1立方分米,记作1分米3(dm3);,棱长为1米的正方体,体积是1立方米,记作1米3(m3)。,做一做,看一看。,生活中还有哪些物体的体积大约是1cm3,1dm3,1m3?,1粒花生米的 体积约1cm3,1个粉笔盒的 体积约1dm3,1个29英寸电视机包装箱的体积约1m3,1.我们学习了哪些体积单位?举例说一说这些单位的实际大小。,2.填上适当的体积单位。,铅笔盒,橡皮,牙膏盒,水果箱,集装

2、箱,75,8,50,48,40,cm3,cm3,cm3,dm3,m3,容器内盛放液体的量一般用升(L)、毫升(mL)作单位。看一看,认一认。,棱长为1dm的正方体的容积是1L;,棱长为1cm的正方体的容积是1mL。,看一看。,3.填上适当的容积单位。,矿泉水,食用油,桶装矿泉水,微波炉,500,mL,5,L,18.9,L,16,L,4.估一估杯中大约有多少毫升饮料,填一填。,容积600mL,大约有( )mL 饮料,大约有( )mL 饮料,400,200,5.下列图形都是用1cm3的正方体搭成的,分别求出它们的体积。,6.填上适当的单位。一个苹果的体积约是120 ,一个西瓜的体积约是8 ,一台冰箱的容积约是150 ,一块橡皮的体积约是8 ,一个小墨水瓶的容积约是60 ,一个热水瓶的容积约是2 。,cm3,dm3,L,cm3,mL,L,7.实践活动。调查一些物体的体积或容积,记录下来,并与同伴交流。,

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