1、学生自探结束后,在全班汇报自探情况;
2、针对自探中不能解决的问题,汇报改写过程(激发冲突)(先划分级线,把万位后面的4个0省略掉,换成一个“万”字。)
3、及时尝试。(完成教材例5后面的“做一做”。)(独立完成,集体订正,叙述改写过程。)
1.复习亿以内数的'改写和求近似数。首先让学生举例说出一个含有两级的大数,其他学生在自己的本子上写出来,一生板演。根据学生举得例子要求将整万的数改写成“万”做单位的数,将不是整万的数,用“四舍五入”法省略万位后面的尾数,重点让学生说一说怎样改写和求近似数的方法。
2.“你能举例含有三级的大数吗?”老师的这个问题引发学生的兴趣,大家争先举例,板书呈现出来。
1、我当小老师
请根据本节所学内容编写一道题目考考你的同桌。
2、教师根据学生出题情况,适当补充或纠正。
把下面的数改写成用“万”作单位的数。
2009年全年国内旅游人数达1902|0000人次,国内旅游收入10200|0000元,入境旅游人数1260|0000人次,旅游外汇收入3970|0000美元。
3、通过本节课的学习,你有哪些收获?(先由学生小结本节所学内容,在学生总结的基础上老师补充纠正
按要求写单词:
old(反义词___________short(比较级____________watch(现在分词_____________donot(缩写形式_________do(第三人称单数_________shorter(反义词__________his(名词性物主代词_________one(序数词___________bus(复数___________my(名词性物主代词__________
用所给动词的.适当形式填空:
1、Peter_______(liketoplayfootball.
2.Dannysometimes_________(gotothebeach.
3.What_____you_____(donow?I___________(gotothecinema.
4.Howold______(beBenandKitty?
5.Inever__________(playthepianowithmybrother.
6.LiMing_________(workhardinschool.
7.Hong_________(havesomechickensbefore.
8.Danny_______(getupatfiveo’clockyesterdaymorning.
9.Look!They______________(sitonthechairs.
10.He________(swiminthepondyesterday.
按要求写单词:
old(反义词___________short(比较级____________watch(现在分词_____________donot(缩写形式_________do(第三人称单数_________shorter(反义词__________his(名词性物主代词_________one(序数词___________bus(复数___________my(名词性物主代词__________
用所给动词的适当形式填空:
1、Peter_______(liketoplayfootball.
2.Dannysometimes_________(gotothebeach.
3.What_____you_____(donow?I___________(gotothecinema.
4.Howold______(beBenandKitty?
5.Inever__________(playthepianowithmybrother.
6.LiMing_________(workhardinschool.
7.Hong_________(havesomechickensbefore.
8.Danny_______(getupatfiveo’clockyesterdaymorning.
9.Look!They______________(sitonthechairs.
10.He________(swiminthepondyesterday.
按要求写单词:
old(反义词___________short(比较级____________watch(现在分词_____________donot(缩写形式_________do(第三人称单数_________shorter(反义词__________his(名词性物主代词_________one(序数词___________bus(复数___________my(名词性物主代词__________
用所给动词的适当形式填空:
1、Peter_______(liketoplayfootball.
2.Dannysometimes_________(gotothebeach.
3.What_____you_____(donow?I___________(gotothecinema.
4.Howold______(beBenandKitty?
5.Inever__________(playthepianowithmybrother.
6.LiMing_________(workhardinschool.
7.Hong_________(havesomechickensbefore.
8.Danny_______(getupatfiveo’clockyesterdaymorning.
9.Look!They______________(sitonthechairs.
10.He________(swiminthepondyesterday.
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