人教版六年級上冊百分數(shù)的認識課件2

1、百分數(shù)的認識峨邊縣街小學 何進濤 人教版小學數(shù)學六年級上冊 敢敢說問想辯錯我們的口號在括號里填數(shù)，你會填什么？（ ） 200多年前，瑞士數(shù)學家歐拉，在通用算術(shù)一書中說，要想把7米長的一根繩子分成3等份是不可能的，因為找不到一個合適的數(shù)來表示它，如果我們把它分成三等份，每份是多少米。這就是一種新的數(shù)，我們把它叫做分數(shù)，而后，人們在分數(shù)的基礎(chǔ)上又以100做基數(shù)，發(fā)明了百分數(shù)。姓名投中個數(shù) 1 36 2 16 3 9你認為應該選派哪名教師參賽?姓名投中個數(shù)投籃次數(shù)1 36 502 16 253 9 10 投中 個數(shù)投籃次數(shù)投中次數(shù)占投籃次數(shù)的幾分之幾13650 21625 3910182591016

2、25 投中個數(shù)投籃次數(shù)投中次數(shù)占投籃次數(shù)的幾分之幾投中次數(shù)占投籃次數(shù)的百分之幾1 36 50 2 16 25 3 9 10 16259101825721006410090100 投中個數(shù)投籃次數(shù)投中次數(shù)占投籃次數(shù)的幾分之幾投中次數(shù)占投籃次數(shù)的百分之幾1 36 50 72%2 16 25 64%3 9 10 90%16259101825隊員投中個數(shù)投籃總個數(shù) 命 中 率1號36502號16253號9104號7105號586號13207號20268號21289號101410號375271.2%71.4%72%75%76.9%65%62.5%70%64%72%64%72%64%70%72%64%62

3、.5%70%72%64%65%62.5%70%72%64%76.9%65%62.5%70%72%64%75%76.9%65%62.5%70%72%64%71.4%75%76.9%65%62.5%70%72%64%71.2%71.4%75%76.9%65%62.5%70%72%64%72%64%72%64%72%64%70%72%64%62.5%70%90%72%64%65%62.5%70%72%64%76.9%65%62.5%70%72%64%75%76.9%65%62.5%70%72%64%71.4%75%76.9%65%62.5%70%72%64%72%64%72%64%70%72%64%

4、62.5%70%72%64%65%62.5%70%72%64%76.9%65%62.5%70%72%64%75%76.9%65%62.5%70%71.4%75%76.9%65%62.5%70%80%910隊員投中個數(shù)投籃總個數(shù) 命 中 率1號36502號16253號9104號7105號586號13207號20268號21289號101410號375271.2%71.4%72%75%76.9%65%62.5%70%90%64%72%64%72%64%70%72%64%62.5%70%72%64%65%62.5%70%72%64%76.9%65%62.5%70%72%64%75%76.9%65%6

5、2.5%70%72%64%71.4%75%76.9%65%62.5%70%72%64%71.2%71.4%75%76.9%65%62.5%70%72%64%72%64%72%64%72%64%70%72%64%62.5%70%72%64%65%62.5%70%72%64%76.9%65%62.5%70%72%64%75%76.9%65%62.5%70%72%64%71.4%75%76.9%65%62.5%70%72%64%72%64%72%64%70%72%64%62.5%70%72%64%65%62.5%70%72%64%76.9%65%62.5%70%72%64%75%76.9%65%62

6、.5%70%72%64%71.4%75%76.9%65%62.5%70%72%910隊員投中個數(shù)投籃總個數(shù) 命 中 率1號36502號16253號9104號7105號586號13207號20268號21289號101410號375271.2%71.4%72%75%76.9%65%62.5%70%80%64%72%64%80%72%64%70%80%72%64%62.5%70%80%72%64%65%62.5%70%80%72%64%76.9%65%62.5%70%80%72%64%75%76.9%65%62.5%70%80%72%64%71.4%75%76.9%65%62.5%70%80%72

7、%64%71.2%71.4%75%76.9%65%62.5%70%80%72%64%72%64%72%64%80%72%64%70%80%72%64%62.5%70%80%72%64%65%62.5%70%80%72%64%76.9%65%62.5%70%80%72%64%75%76.9%65%62.5%70%80%72%64%71.4%75%76.9%65%62.5%70%80%72%64%72%64%80%72%64%70%80%72%64%62.5%70%80%72%64%65%62.5%70%80%72%64%76.9%65%62.5%70%80%72%64%75%76.9%65%62

8、.5%70%80%72%64%71.4%75%76.9%65%62.5%70%90%72%64%910隊員投中個數(shù)投籃總個數(shù) 命 中 率1號36502號16253號9104號7105號586號13207號20268號21289號101410號375271.2%71.4%72%75%76.9%65%62.5%70%80%64%72%64%80%72%64%70%80%72%64%62.5%70%80%72%64%65%62.5%70%80%72%64%76.9%65%62.5%70%80%72%64%75%76.9%65%62.5%70%80%72%64%71.4%75%76.9%65%62.5

9、%70%80%72%64%71.2%71.4%75%76.9%65%62.5%70%80%72%64%72%64%72%64%80%72%64%70%80%72%64%62.5%70%80%72%64%65%62.5%70%80%72%64%76.9%65%62.5%70%80%72%64%75%76.9%65%62.5%70%80%72%64%71.4%75%76.9%65%62.5%70%80%72%64%72%64%80%72%64%70%80%72%64%62.5%70%80%72%64%65%62.5%70%80%72%64%76.9%65%62.5%70%80%72%64%75%7

10、6.9%65%62.5%70%80%72%64%71.4%75%76.9%65%62.5%70%90%72%64%910隊員投中個數(shù)投籃總個數(shù) 命 中 率1號36502號16253號9104號7105號586號13207號20268號21289號101410號375271.2%71.4%72%75%76.9%65%62.5%70%80%64%72%64%80%72%64%70%80%72%64%62.5%70%80%72%64%65%62.5%70%80%72%64%76.9%65%62.5%70%80%72%64%75%76.9%65%62.5%70%80%72%64%71.4%75%76.

11、9%65%62.5%70%80%72%64%71.2%71.4%75%76.9%65%62.5%70%80%72%64%72%64%72%64%80%72%64%70%80%72%64%62.5%70%80%72%64%65%62.5%70%80%72%64%76.9%65%62.5%70%80%72%64%75%76.9%65%62.5%70%80%72%64%71.4%75%76.9%65%62.5%70%80%72%64%72%64%80%72%64%70%80%72%64%62.5%70%80%72%64%65%62.5%70%80%72%64%76.9%65%62.5%70%80%7

12、2%64%75%76.9%65%62.5%70%80%72%64%71.4%75%76.9%65%62.5%70%90%72%64%910 2006年，全國各省、自治區(qū)、直轄市，上報的各類安全事故中，事故災難占 ；社會安全事故占 ；自然災害占 ，其中，溺水占 ，交通事故占 ，斗毆占 ,校園傷害占 ，中毒占 ，學生踩踏事件占 ，自殺占 ，房屋倒塌占 ，自然災害占 ，其他意外事故占 。 2006年，全國各省、自治區(qū)、直轄市，上報的各類安全事故中，事故災難占59%；社會安全事故占31%；自然災害占10%。其中，溺水占31.25%，交通事故占19.64%，斗毆占10.71%,校園傷害占14.29%，中毒占2.68%，學生踩踏事件占1.79%，自殺占5.36%，房屋倒塌占0.89%，自然災害占9.82%，其他意外事故占3.57%。百分數(shù)家族的信息發(fā)布會：（ ）和（ ）比 （ ）占（ ）的（ ）說說下面這些百分數(shù)所表示的意思。100%表示：羊毛材料占衣服材料的100%100%表示：果汁的質(zhì)量占總質(zhì)量的100%姚明加盟NBA聯(lián)賽的第一年，投籃命中率為49.8%。投中的個數(shù)占投籃總個數(shù)的49.8%。今年房價上漲10% 100% 110% 今年房價下降10% 100% 90% 命中率增加10%