北京版Lesson 22公开课教学ppt课件

这是一份北京版Lesson 22公开课教学ppt课件，共22页。PPT课件主要包含了Thank you，Well done，oil，coin，join，boil，noisy，boy，toy，joy等内容，欢迎下载使用。
We learned cllectins in this unit. We learned the additin and subtractin f numbers. Let’s review.
My cllectins
May I brrw yur glue, please?
Certainly. Here yu are.
Yu are welcme.
May I brrw yur markers, please?
Here yu are. I cllect markers.I have fifty markers.
Yu have s many erasers.
Yes. I have sixty.
I cllect rulers. I have frty.
What d yu cllect, Gugu?
Yu have s many ty cars.
Yes. I cllect them. I have twenty.
I have ten.
Let’s put them tgether. Twenty plus ten is thirty.
Lk at the numbers n the blackbard: 50, 60, ____, ____, 90. Wh can guess the missing numbers?
It’s easy. Fifty plus ten is sixty. S the missing numbers are seventy and eighty.
One hundred minus ten is ninety.
Ninety minus ten is eighty.
S the missing numbers are eighty and seventy.
That nisy by has many tys.
The tys give him great jy.
1.—What d yu cllect? —I cllect stickers. I have fifty. 2.—May I brrw yur eraser? —Certainly. I cllect erasers.  I have sixteen.
Twenty plus thirty is fifty.
Frty plus fifty is ninety.
Seventy minus ten is sixty.
Eighty minus sixty is twenty.
pencils rulers erasers markers bks crayns
1. I have twenty ______ . 2. I have thirty ______ . 3. I have frty ______ .
4. I have fifty ______ 5. I have sixty ______ 6. I have seventy ______ .
What d yu cllect?
I cllect pens. I have twenty.
I cllect crayns. I have sixty.
What is twenty plus frty?
It’s sixty.
What is thirty plus sixty.
It’s ninety.
What is seventy minus fifty.
It’s twenty.
What is eighty minus ten.
It’s seventy.