老师
Hello, boys and girls. Glad to see you again. I'm your teacher, Miss Wang. Today we are going to learn Unit 8, Revision 2. Last class, we have reviewed Unit 5 and Unit 6. This class we will go on reviewing. Before the clause, please prepare your English book, a pencil, a ruler and the worksheet. Ready? Let's go.
老师
Do you remember what Miss Wong likes? Great. I clicked the leaves. I have many leaves. Look, I collect the yellow leaves. I collect the green leaves. I also collect red leaves. I think they are very beautiful. Look. Do you know how many green leaves I have? Great. I have 50 green leaves. I also have 13 yellow leaves. Let's put them together. How many leaves do I have now? Who wants to answer? Chen, please.
学生
50+30 is eighty. You have eighty.
老师
Very good. 50+30 is eighty. Look, how about now? What is 80 minus ten? Who can answer? Tian? Tian, please.
学生
80 minus ten is seventy.
老师
Good job. 80 minus ten is seventy. Look at those numbers. There are four numbers. They