四年级数学下册6.2《栽蒜苗(一)》课件1北师大版.ppt

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1、栽蒜苗(一),栽蒜苗,小组蒜苗14天后生长情况表,把小组同学的数据填入表格内后,同学们都知道了谁的蒜苗长得高,谁的蒜苗长得矮。为了形象地反映这些蒜苗生长的情况,还有其他的方法吗?,( ),( ),( ),( ),( ),( ),( ),( ),( ),( ),( ),( ),( ),( ),姓名,制作统计图,刚才大家想出了用一格表示多个单位的好办法,它能解决格子不够用的问题。那么每张图上的每一格到底表示几个单位,还与所画条形的数据有关。如果数据很大,那么每一格所表示的单位就多,数据小,那么所表示的单位就小。,返回,( 21),(18 ),(15 ),( 12),( 9 ),( 6 ),( 3

2、 0 ),( 24),姓名,从条形统计图中你发现了什么?,练一练,小平、小青、小华、小玲、小敏5个小朋友的踢毽子成绩分别是:40个、35个、25个、50个、45个。将这些成绩绘制成条形统计图。,返回,试一试,1.为丰富同学们课外生活,学校组织了各种兴趣活动小组。右图为四(1)班全体学生参加的课外兴趣小组人数统计图。,四(1)班学生课外兴趣小组人数统计图,人数/人,你能说出各个兴趣小组的人数吗?,你还能提出什么问题?,2.冬天到了,学校开展了小小运动会。小平、小青、小华、小玲、小敏参加了掷球、1分钟跳绳、踢毽子的比赛。下图是他们掷球、跳绳的成绩。,掷球比赛成绩统计图,成绩/米,跳绳比赛成绩统计图,成绩/个,你知道他们掷球与跳绳的成绩吗?,从图中你还获得了什么信息?,本课小结,本节课我们主要学习了哪些内容?同学之间互相讨论一下!,

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