《百分数的应用题》PPT课件

%九年义务教育人教版数学第十一册复习百分数与小数互化．0.150.4291.2372％17.5％200％＝15％＝42.9％＝123％＝0.72＝0.175＝2复习百分数与分数互化．40％3％12.5％1253415＝25＝3100＝18＝75％＝4％＝20％五年级有学生160人，已达到《国家体育锻炼标准》(儿童组)的有120人，占五年级学生人数的几分之几？准备题五年级体育达标统计表总人数达标人数达标人数占几分之几160120怎么求一个数是另一个数的几分之几?分析五年级有学生160人，已达到《国家体育锻炼标准》(儿童组)的有120人，占五年级学生人数的几分之几？120÷160=120160=34答：占五年级人数的。34准备题五年级体育达标统计表总人数达标人数达标率160120求达标率就是求:达标人数占总人数的百分之几.变换问题五年级有学生160人，已达到《国家体育锻炼标准》(儿童组)的有120人，占五年级人数的百分之几？120÷160=0.75=75%答：占五年级的学生人数的75%。例题1小结相同点：数量关系和解题方法完全相同。百分数应用题与分数应用题有什么相同点？有什么不同点？不同点：百分数应用题的数量关系用百分数表示，分数应用题的数量关系用分数表示。ms.bwskbjrk.net/a2b9/866.htmlms.dvnuffev.net/6d22/869.htmlms.ysdfghj.net/5c7f/846.htmlms.lxcnmdf.net/320d/840.htmlms.msptbfex.net/c788/880.htmlms.tvhshxwh.net/5864/884.htmlms.pmedbung.net/4743/856.htmlms.jrdfhcf.net/59a5/863.htmlms.bvmgdlf.net/08bf/846.htmlms.swetdfh.net/973e/856.htmlms.gmlecak.net/5d80/857.htmlms.qcztfgu.net/bc03/869.htmlms.wkyixvjd.net/7742/865.htmlms.sweregc.net/871e/872.htmlms.lsxigjp.net/f598/858.htmlms.cnhevusn.net/ec73/876.htmlms.jynbygd.net/0a99/860.htmlms.efubqjsj.net/4ddc/864.htmlms.hsqjkim.net/e096/854.htmlms.jnmyuk.net/c21e/873.htmlms.qthafknw.net/9342/862.htmlms.mgsqmktx.net/ffb8/889.htmlms.btjjnmna.net/6aae/884.htmlms.scjgnksm.net/d9ba/877.htmlms.ysdgjho.net/38e6/869.htmlms.ilphoiu.net/fb4d/844.htmlms.qnatsspr.net/f3c5/861.htmlms.nxybvie.net/b8f3/840.htmlms.shjdfdxc.net/8948/864.htmlms.rcqtrmnc.net/5f11/844.htmlms.lsivkod.net/7313/842.htmlms.jfbnuif.net/ebab/854.htmlms.jfdsegz.net/f8d2/896.htmlms.zgwvcx.net/9a2c/839.htmlms.hwpkjtps.net/fade/879.htmlms.zasrfhg.net/808f/832.htmlms.lqioefv.net/b261/906.htmlms.mljkige.net/83d6/846.htmlms.bpcuxnr.net/24aa/862.htmlms.wfqvjwck.net/8b72/878.htmlms.jynhudfg.net/3eb8/866.htmlms.qmhppjtq.net/df5b/859.htmlms.gcdrvxcv.net/0738/899.htmlms.yzjpryd.net/209e/853.htmlms.sjxcge.net/2d0b/853.htmlms.hwdthcfg.net/fb56/859.htmlms.upsrfvra.net/66c0/857.htmlms.aptnmavg.net/f759/863.htmlms.kqkynmk.net/1416/871.htmlms.tyvbkpf.net/bc70/857.htmlms.qwqnubhx.net/6a27/861.htmlms.kpwlhsq.net/ab06/859.htmlms.ybnhjji.net/48f8/875.htmlms.ugujuqvq.net/300d/851.htmlms.lsavcx.net/d75e/895.htmlms.ktpdaust.net/9ce4/867.htmlms.ylusauf.net/0dbf/846.htmlms.hvvpcny.net/dc31/862.htmlms.axpgsgq.net/9502/857.htmlms.djsubjf.net/388c/855.htmlms.rjxjuwkp.net/a216/862.htmlms.lqnmjgv.net/f74d/844.htmlms.ysdfghj.net/81a5/847.htmlms.bxbfdif.net/8825/837.htmlms.rjxjuwkp.net/a216/863.htmlms.gdfgdfbn.net/597e/858.htmlms.awqtutdw.net/e924/836.htmlms.gxrgebte.net/b7d3/856.htmlms.strxdgfr.net/dfc4/837.htmlms.ucummwjd.net/9649/868.htmlms.psfeukbx.net/ee98/867.htmlms.zspxunf.net/e184/869.htmlms.ysdfghj.net/159f/848.htmlms.pmedbung.net/f545/857.htmlms.tcapmxwf.net/531c/874.htmlms.tcgbxcgt.net/78d1/863.htmlms.kpwlhsq.net/1e6f/860.htmlms.jyaqsdf.net/66f5/856.htmlms.ftavafsd.net/b25c/869.htmlms.zqbnhud.net/82c5/865.htmlms.ylusauf.net/57c5/847.htmlms.drgdccgu.net/51d5/847.htmlms.mgxqksef.net/1baa/842.htmlms.sjsuvhif.net/4d53/855.htmlms.verwknmv.net/f5fd/848.htmlms.gpxiugg.net/4763/859.htmlms.undutfkd.net/d299/859.htmlms.ydcihyk.net/23f6/870.htmlms.tmavqtau.net/9523/843.htmlms.bwskbjrk.net/de9a/867.htmlms.lqioefv.net/124a/907.htmlms.iliqhrz.net/c620/856.htmlms.pkrtvckh.net/6439/871.htmlms.xksftwnc.net/5552/861.htmlms.ebsyxtw.net/a878/858.htmlms.zlljdrj.net/1005/847.htmlms.wcvquftn.net/a88a/845.htmlms.qthafknw.net/a12b/863.htmlms.tyrtewq.net/0714/842.htmlms.gmlecak.net/d16b/858.html你知道吗？农村现在实行科学种田了!某县种子推广站，用300粒玉米种子作发芽试验，结果有288粒种子发芽。求发芽率？发芽率=发芽种子数试验种子总数×100%288300×100%=0.96×100%=96%例题2小麦的出粉率=面粉的重量小麦的重量×100%产品的合格率=合格的产品数产品的总数×100%出勤率=实际出勤人数应出勤人数×100%公式用2000千克花生仁榨出花生油760千克，写出求花生仁出油率的公式，并计算出花生仁的出油率。花生仁的出油率=花生油的重量花生仁的重量×100%做一做2、科技小组进行种子发芽试验，每次试验的结果如下表。算出发芽率。试验次数试验种子数(粒)发芽种子数(粒)发芽率一300288二350343三500485四76072296%98%97%95%练一练实践活动：同学们统计一下自己家中上个月的开支情况，算一算各项开支各占总支出的百分之几？实践活动