Unit 4 Look at the T-shirts.
T-shirt
What colour is it? It is black .
trousers
What colour is it? It is blue .
dress
What colour is it? It is white.
shorts
试一试:请把下列各数进行分类,填入相应的地方: 0, -12 , 0.35 , 1 , -3.14 ,5.34 ,-58 ,0.13 源自1 3按数的性质来分:
正数的有:(
负数的有:(
8
5 4 2
00 ,0.35 ,1,5.34 0.132 1 4
3
-
)
1
2
)
非正非负数:(
,
)
-
试一试:请把下列各数进行分类,填入相应的地方:
Look at the T-shirts. They are beautiful. Yes. I like the red one.
我的翻译结果是:
看这些T恤。它们都很漂亮。 是的。我喜欢红色的这件。
I like the green one,
but it’s too big.
Look at the blue shorts.
课堂练习:下列各数哪些是无理数?
,3.14 , 0.1010010001…,
2 , 3 , 9 , 2 1
5
答0案3.,211,,:0无1理00数10有001…
Look at my new T-shirt.
看我的新T恤。
It’s very nice.
它很漂亮。
我观察、我发现!
This is my dress.