2. 估计下列图形的面积(每个小方格的面积表示$1\mathrm{cm}^2$)。

面积约为()
面积约为()

面积约为(8)
面积约为(12)

3. 求下列图形中阴影部分的面积。

4×4÷2 + 8×4÷2 = 8 + 16 = 24（cm²）
6×6÷2 + 6×(9-6)÷2 = 18 + 9 = 27（cm²）
15×10 - (10 + (15-4-4))×4÷2 = 150 - 34 = 116（cm²）
答：三个图形的阴影面积分别是24cm²、27cm²、116cm²。

第27页的答案：1.(1)吃农家炒花菜 (2)性格无比坚强 (3)变得灰头土脸 依然叶子碧绿,花菜朵雪白(只要前后形成对比,且是同一个方面的对比即可) 2.花菜不怕开水烫、热油烹、辣椒炸、酸醋熏。
根据图片内容完成对话。Complete the dialogue according to the picture.

Alice: Tomorrow is Saturday. What are you going to do?
Lily: I have no idea. What you?
Alice: I want to go shopping. Would you like to go me?
Lily: OK. When are we going to meet?
Alice: At past tomorrow morning.
Lily: How are we going there?
Alice: Let's go there by .
Lily: Let's meet at the school .
Alice: OK. See you tomorrow.
Lily: you.

1. about
2. with
3. half
4. seven
5. bike
6. gate
7. See
完整对话：
Alice: Tomorrow is Saturday. What are you going to do?
Lily: I have no idea. What about you?
Alice: I want to go shopping. Would you like to go with me?
Lily: OK. When are we going to meet?
Alice: At half past seven tomorrow morning.
Lily: How are we going there?
Alice: Let's go there by bike.
Lily: Let's meet at the school gate.
Alice: OK. See you tomorrow.
Lily: See you.