《I'm twelve》PPT课件2

《I'm twelve》PPT课件2

Ask and answer:

How many … are there?

There are  …  

This is a classroom.

How many … are there in the classroom?

There are … in the classroom.

There is a/an … in the classroom.

... ... ...

Listen and repeat.

11          12           13            14      

eleven    twelve    thirteen    fourteen  

15          16           17            18    

fifteen   sixteen   seventeen  eighteen

19            20

nineteen  twenty

... ... ...

Let's calculate!

two + fourteen =sixteen

nine + one =ten

four + eight =twelve

six + seven=thirteen

four - one =three

Listen and point.

1. 11+4 = 15

2. 12+6 = 18

3. 14+6 = 20

4. 17+2 = 19

... ... ...

规则类：相应数字英文+teen

14：fourteen， 16：sixteen，

17：seventeen，18：eighteen

19：nineteen

不规则类：

11：eleven，12: twelve， 

13：thirteen，15：fifteen ，

20：twenty

... ... ...

Do you know them？

+：Plus /and

- ：minus

=：is

如：12+2=14

twelve and two is fourteen

About quantity

How many… are there?

How much…  is there?

How ______ pens are there?

There are _____ pens.

How ______ meat is there?

There is  a kilo. 

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