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1.能理解对话内容，能听懂、会用英语表达100以内的加、减法。
2.能够认读单词blackboard, missing, seventy, eighty, ninety, one hundred.
3.能够用英语解决实际生活中的数学问题。
教学重、难点：
教学重点：
1.能理解对话内容，能听懂、会用英语表达100以内的加、减法。
2.能区分minus和plus.
教学难点：
1.能够用英语解决实际生活中的数学问题。
教学过程教学阶段教师活动学生活动设置意图时间安排Step1:
Warming up
T: Let’s sing a song.(number song)
T: We can see numbers everywhere. (Talk about numbers in our life)
T: We can also see a lot numbers in the supermarket. Use numbers to do the math work in our life.
S: Sing a song.
S: Talk about numbers in our life
S: Do math work in our life.
通过歌曲激发学生的兴趣并在歌曲中复习所学数字。
通过谈论生活中的数字，既巩固了旧知，同时也为本课的学习做了很好的铺垫。
5minsStep2:
Presentation Talk about the picture 1
（呈现主题图）
T：What do you want to know about the picture? Do you have any questions?
Q1：Let’s watch the video and try to find out what are they doing?
Watch the video
T: (After watching) What are they doing?
T: Today they are enjoying a maths class. First, Lala will be the little teacher. He asks a question. This time let’s listen and try to find out what’s Lala’s question.
Watch the video again
Q2: What’s Lala’s question?
T:Lala tells us a lot of numbers, Do you remember them?【呈现板书50， 60，----，-----，90】Can you guess the missing numbers? What are they?