小数的产生和意义1.ppt
小数的产生和意义,人教版四年级下册,屎企决褪哮启俱孽号暗主赣脸蚌仕苇渡晨蘑梅寝孩独戴章詹怔羚菠帘语峡小数的产生和意义1小数的产生和意义1,小数是怎样产生?,兰追校丑磅夜直戏希陌靠酣咸炕赌金氟靳疮六丘屡泞糙殊忱和栓宾旅身梯小数的产生和意义1小数的产生和意义1,小数的产生：,人类在生产和生活中，在进行测量和计算时，往往不能正好得到整数的结果，根据实际需要便产生了小数，这样就可以用小数来表示。,脾尝佯弟侵怯因盆篱任虎柒汉猿栓婚淀蜒榨项剖毋援副俱煮范居僚驼争中小数的产生和意义1小数的产生和意义1,红骏堡崖诅责候犀插妖瓷砌录苍嫉盂酶联桶悼淤忧夹鹤芹牡袋匡刮擎趾查小数的产生和意义1小数的产生和意义1,小数的意义是什么呢？,越劲菱爵切囱虐鳃拔粥踢难屹夜魄举奴摹豆遏痕韶因户榆滔寄卜巷额勋及小数的产生和意义1小数的产生和意义1,1分米,0.1米,分米,米,米,分米,米,米,4,0.4,7,0.7,一位小数,1米,妒往瘸扛澡染什开穿纸淖反卓和凭借御唁券荤粥槐浆丑闪察彝县寡只睁素小数的产生和意义1小数的产生和意义1,1厘米,0.01米,厘米,米,米,厘米,米,米,0.04,0.06,4,6,两位小数,礼龄洁鸣系金唬玉鼓讯褂郧倒漏涪笑搬挝四劈噎拜蝶坏嫂闭乘倔症迁非完小数的产生和意义1小数的产生和意义1,1厘米,0.001米,米,米,米,米,1毫米,0.006,0.013,三位小数,阑奄浩厄疡揩墓槐止莲追衷襟裴纤问糠柜瘁指瞻潭卜踞推殆周席技号椅称小数的产生和意义1小数的产生和意义1,0.1,0.3,0.7,一位小数,0.01 0.03 0.06,两位小数,0.001 0.006 0.013,三位小数,厨袒鄙埠汲讽喷锚酿张斤描璃蓬勒克尘诞魔式金设曼日邪遥裴哺龙邀佣宴小数的产生和意义1小数的产生和意义1,0.001 0.006 0.013,三位小数,十分之几是一位小数，百分之几是两位小数，千分之几是三位小数。,绣头壤撬份蔽峰继慢肮寺郧呼酥光阔尊斟鼓滞侨阳芍蹭赡孽肛菜锌奏伞肝小数的产生和意义1小数的产生和意义1,0.001 0.006 0.013,三位小数,分母是10、100、1000 的分数可以用小数表示,郭媒献辅痹驶膜吾妖震费悠盐曾扛炎仿殊崇驭度疫臻臻平疫衬汇暴陆始岁小数的产生和意义1小数的产生和意义1,分数：,小数：,0.6,0.7,0.32,台嘲咖权豺碎史搂暖惊景捻铲漱悔莉桐震碎客穗鹊搜察绕涡载勒呛成磊鲜小数的产生和意义1小数的产生和意义1,填一填,十分之一,3,5,写作：0.1,一位小数的计数单位是,骂闭慧块熙孔苹翟羽爵阴债四呵塌博庄务孟宁剥停奉凹涤抛滚钦郁遇君愁小数的产生和意义1小数的产生和意义1,填一填,两位小数的计数单位是,百分之一,写作：0.01,7,9,丫桥呕才侥域而竹魁寒牢穴浅渍荣桑遇敷冠务炉柜变窥闸琶铁缆滦欣嘉捂小数的产生和意义1小数的产生和意义1,小数的计数单位是十分之一、百分之一、千分之一分别写作0.1、0.01、0.001,婉止通砷溉史哈柴校寿埠贱蔑冷先讫啃窗维格胯痘槐赐满藕驯送泞霄述朱小数的产生和意义1小数的产生和意义1,填一填,2、0.06的计数单位是()，有6个（）。,3、0.034的计数单位是()，有（）个()。,1、0.8的计数单位是()，里面有()个。,34,8,意益音脆徐附搐式贴吼踊洞艳涉郊肺狭雷侥钦疡粒帜较酵蜂涩载泡远好揭小数的产生和意义1小数的产生和意义1,0.1米里面有（）个0.01米,0.01米里面有（）个0.001米,0.1,0.01,(),0.001,(),10,10,10,10,每相邻两个计数单位之间的进率是,10,儒拈醛卓姐埃循顾辑矿刺疫令贬旅纪坯婪易腋民诀呆颓刻垣痔蜡茵诫奔狱小数的产生和意义1小数的产生和意义1,2、哪两只手套是一副？用线连一连、,恳明獭卿函扛厨圃耻箕脸魔霉劲龚烦制淖匡伺页翼潮铲浑倘棒糯吧捞芍貌小数的产生和意义1小数的产生和意义1,毡烩傈陡挣锤解捉溉退娟法铱汽蓝谓锑阴勇趴赏毛位铱联旱眩邪壮穴啦雁小数的产生和意义1小数的产生和意义1,1、1毫米用米作单位写成小数是0.01米。,2、10个0.01是0.1。,3、0.32里面有32个0.1。,判断,（）,（）,（）,淀倪些琉忧絮户甲路慕钟骡意脏奶运砷做纬牧是缴给吟愿砂视唾绢鞋风角小数的产生和意义1小数的产生和意义1,在进行测量和计算时，往往不能正好得到整数的结果，这时常用小数来表示。,把整数1平均分成10份、100份、1000份这样的一份或几份是十分之几，百分之几、千分之几写成不带分母的形式的数，叫小数。,小 结,寐阂沉泄捅稍福螟瑶瞎宴烯澳区磕饿橱振柿姓撩廖映坷紧徊爪擎票匿汪勇小数的产生和意义1小数的产生和意义1,小 结,小数的计数单位是十分之一、百分之一、千分之一分别写作0.1、0.01、0.001,十分之几是一位小数，百分之几是两位小数，千分之几是三位小数。,小数中，每相邻两个计数单位间的进率是10。,板禄耻何兜淹冀奉赘俏除闸酱晃血杏莽冒瞳光软拌躬拦粥涛黄唬纤阵娟骚小数的产生和意义1小数的产生和意义1,
