四年级下册英语课件-Unit 2 There are forty students in our class. 人教精通版.(共19张PPT).pptx

Unit 2 There are forty students in our class.对数字对数字90和和100的表达及数字的变化规律的表达及数字的变化规律人教精通版小学英语 四年级下册人教精通版四年级-下册-Unit2 lesson11CONTENTSwarming-up and lead-inconclusionpracticepresentation15619967985189589962351367993824517348862457Lets guessLets guess他们是整十数，而且都是奇数。507030想一想，你还知道哪些100及以内整十数呢？fiftyfiftytwentytwentytwentytwentyninetyninety50 + 20 + 20 = 90presentation九十九十fiftyfiftyfiftyfiftyone hundred 50 + 50 = 100一百一百Language pointsWe have one hundred pencils.我们有我们有100支铅笔。支铅笔。hundred意为意为“百百”， 使用时前面要加具体数字：使用时前面要加具体数字：具体数词（具体数词（one nine）+ hundred如如 ：two hundred students 两百学生。两百学生。例句：公园里有例句：公园里有300人。人。 There are three hundred people in the park.Can you write them?I can do it.twenty + eighty =thirty + seventy =forty + fifty =thirty + sixty =one hundredone hundredninetyninetypractice90How many eggs do you have?We have ninety eggs.Play rolesWe have one hundred books.100How many books do you have?90How many pens do you have?We have ninety pens.100How many apples do you have?We have one hundred apples.数字单词很容易，数字单词很容易，1 1至至1212特殊记特殊记twelve 十二十二conclusion13数到数到19去，后加去，后加-teen莫忘记莫忘记。nineteen十九十九20以上整十数，结尾都把-ty来加。ninety 九十九十Thank you!