四年级数学下册第4单元《小数的意义和性质》2小数的性质和大小比较(小数的大小比较)课件新人教版.ppt

上传人:ownview251 文档编号:1208049 上传时间:2019-05-25 格式:PPT 页数:19 大小:1.47MB
下载 相关 举报
四年级数学下册第4单元《小数的意义和性质》2小数的性质和大小比较(小数的大小比较)课件新人教版.ppt_第1页
第1页 / 共19页
四年级数学下册第4单元《小数的意义和性质》2小数的性质和大小比较(小数的大小比较)课件新人教版.ppt_第2页
第2页 / 共19页
四年级数学下册第4单元《小数的意义和性质》2小数的性质和大小比较(小数的大小比较)课件新人教版.ppt_第3页
第3页 / 共19页
四年级数学下册第4单元《小数的意义和性质》2小数的性质和大小比较(小数的大小比较)课件新人教版.ppt_第4页
第4页 / 共19页
四年级数学下册第4单元《小数的意义和性质》2小数的性质和大小比较(小数的大小比较)课件新人教版.ppt_第5页
第5页 / 共19页
点击查看更多>>
资源描述

1、小数的大小比较,整数的大小比较方法:,先比较整数位数的多少,位数多的整数就大如果位数同就比较左起第一位,第一位大的那个数就大,如果相同,则比较左起第二位,第二位大的那个数就大,比较小数的大小,先看哪一部分?如果整数部分相同,又该怎样来确定它们的大小呢?同桌相互交流。,探讨交流,先比较整数部分,整数部分 大的那个数就大;如果整数部分相同的,那么十分位上的数大的那个数就大;如果十分位上的数相同,那么百分位上的数大的那个数大,小数大小的比较方法:,想一想:小数大小比较与整数大小比较有什么不同点?,比较下面各组数中两个小数的大小(用手势表示):,0.458 0.54,2.35元 2.41元,6.53

2、 6.29,0.07米 0.059米,尝试与应用,3、抢答题:,尝试与应用,3、抢答题:,尝试与应用,3、抢答题:,尝试与应用,3、抢答题:,尝试与应用,3、抢答题:,(5)小数的位数越多,这个小数就越大。( ),尝试与应用,3、抢答题:,(6)小数的大小比较和整数的大小比较相同,都是从高位比起,相同数位上的数相比较。( ),尝试与应用,2、用直线上的点表示下面各数,并比较每组中两个数的大小。,0.09 和 0.12,0.28 和 0.3,0.4 和 0.04,考考你:下面的小数各在哪两个相邻的整数之间,1,2,24,23,5,6,71,70,0.807米,0.78米,0.87米,0.708米,0.7米,0.8米,0.88米,比比他们谁高谁矮?,0.807米,0.78米,0.87米,0.708米,0.7米,0.8米,0.88米,甲、乙、丙、丁四个人的身高是1.46米、1.52米、1.38米、1.5米。已知甲比丁高,但又比丙矮,丁比乙矮,甲比乙高。你知道甲、乙、丙、丁四个人的身高分别是多少米吗?,思考题:,答案:,丙 甲 乙 丁 1.52米 1.5米 1.46米 1.3米,谢谢!,

展开阅读全文
相关资源
猜你喜欢
  • DIN CEN TR 16303-2-2012 Road restraint systems - Guidelines for computational mechanics of crash testing against vehicle restraint system - Part 2 Vehicle Modelling and Verificatio.pdf DIN CEN TR 16303-2-2012 Road restraint systems - Guidelines for computational mechanics of crash testing against vehicle restraint system - Part 2 Vehicle Modelling and Verificatio.pdf
  • DIN CEN TR 16303-3-2012 Road restraint systems - Guidelines for computational mechanics of crash testing against vehicle restraint system - Part 3 Test Item Modelling and Verificat.pdf DIN CEN TR 16303-3-2012 Road restraint systems - Guidelines for computational mechanics of crash testing against vehicle restraint system - Part 3 Test Item Modelling and Verificat.pdf
  • DIN CEN TR 16303-4-2012 Road restraint systems - Guidelines for computational mechanics of crash testing against vehicle restraint system - Part 4 Validation Procedures German vers.pdf DIN CEN TR 16303-4-2012 Road restraint systems - Guidelines for computational mechanics of crash testing against vehicle restraint system - Part 4 Validation Procedures German vers.pdf
  • DIN CEN TR 16324-2012 Technical report of the interlaboratory study for the determination of Besatz in common wheat rye and durum wheat German version CEN TR 16324 2012《通用小麦 黑麦和硬质小.pdf DIN CEN TR 16324-2012 Technical report of the interlaboratory study for the determination of Besatz in common wheat rye and durum wheat German version CEN TR 16324 2012《通用小麦 黑麦和硬质小.pdf
  • DIN CEN TR 16332-2012 Non-destructive testing - Interpretation of EN ISO IEC 17024 for NDT personnel certification application German version CEN TR 16332 2012《无损检测 无损检测人员资格认证用EN I.pdf DIN CEN TR 16332-2012 Non-destructive testing - Interpretation of EN ISO IEC 17024 for NDT personnel certification application German version CEN TR 16332 2012《无损检测 无损检测人员资格认证用EN I.pdf
  • DIN CEN TR 16349-2012 Framework for a specification on the avoidance of a damaging Alcali-Silica Reaction (ASR) in concrete English version CEN TR 16349 2012《混凝土中避免破坏硅碱反应(ASR)的规范框架.pdf DIN CEN TR 16349-2012 Framework for a specification on the avoidance of a damaging Alcali-Silica Reaction (ASR) in concrete English version CEN TR 16349 2012《混凝土中避免破坏硅碱反应(ASR)的规范框架.pdf
  • DIN CEN TR 16353-2012 Packaging - Safety guidelines for flexible plastic packaging to minimize the risk of suffocation to children German version CEN TR 16353 2012《包装业 使得儿童窒息风险最小化的.pdf DIN CEN TR 16353-2012 Packaging - Safety guidelines for flexible plastic packaging to minimize the risk of suffocation to children German version CEN TR 16353 2012《包装业 使得儿童窒息风险最小化的.pdf
  • DIN CEN TR 16355-2012 Recommendations for prevention of Legionella growth in installations inside buildings conveying water for human consumption German version CEN TR 16355 2012《预.pdf DIN CEN TR 16355-2012 Recommendations for prevention of Legionella growth in installations inside buildings conveying water for human consumption German version CEN TR 16355 2012《预.pdf
  • DIN CEN TR 16364-2012 Influence of materials on water intended for human consumption - Influence due to migration - Prediction of migration from organic materials using mathematica.pdf DIN CEN TR 16364-2012 Influence of materials on water intended for human consumption - Influence due to migration - Prediction of migration from organic materials using mathematica.pdf
  • 相关搜索

    当前位置:首页 > 教学课件 > 中学教育

    copyright@ 2008-2019 麦多课文库(www.mydoc123.com)网站版权所有
    备案/许可证编号:苏ICP备17064731号-1