Unit6-B-Lets-learn陜西公開課課件

人教PEP三下陜西省西安市育英小學(xué)薛娟Unit3BLet’slearnFindit?1one2two3three4four

5five6six7seven8eight9nine11eleven12twelve13thirteen14fourteen15fifteen16sixteen17

18

19

??6eight18teenLearnmoretwenty-one21twenty-two22twenty-three23?twenty-four24?twenty-five25?twenty-six26?twenty-seven27?twenty-eight28?twenty-nine29?Trytofind.Trytofind.16.0020:00北新街18號(hào)17F16.00北新街18號(hào)20:0017F17+2=19+1=1914+2

=1616+1=9×2

=182017thirteenfifteen

teensixeighteentwen

tyeleventwelveseventeennineteenfourteen19

16

17

18

20TryitTryitHowmanydesksarethereinyourclassroom?

TryitHowmanygirlsarethereinyourclass?Jumpeighteentimes.TryitHowmanyboysarethereinyourclass?TryitTryitHowmanychildrenarethereinyourclass?Doyouknow?通常，我們把1、2、3、4……9、0稱為“阿拉伯?dāng)?shù)字Arabicnumbers”。其實(shí)，這些數(shù)字并不是阿拉伯人創(chuàng)造的，它們最早產(chǎn)生于古代的印度。是由阿拉伯人傳播到各個(gè)國(guó)家。在漫長(zhǎng)的傳播過(guò)程中，印度創(chuàng)造的數(shù)字就被稱為“阿拉伯?dāng)?shù)字”了。這套數(shù)字系統(tǒng)最先只有1、2、3、4、5、6、7、8、9?！?”這個(gè)數(shù)字，在那時(shí)還是一個(gè)黑點(diǎn)。后來(lái)，又經(jīng)過(guò)了幾百年的演化，“0”才正式出現(xiàn)，阿拉伯?dāng)?shù)字在我國(guó)推廣使用才有100多年的歷史。1.Readandwritenumbersfrom16to20.Homework1~~teen11eleven12twelve13thirteen14fourteen15fifteen16sixteen17seventeen18eighteen19nineteen~0~ty10ten20twenty30thirty40fourty50?60?70?80?90?2.Trytocountfrom1to100.嘗試用英語(yǔ)從數(shù)