Unit 4 Numbers Revision

Rivision of the words abacus brain calculator lightning

Say and spell the words according to the meanings 1. _______: almost 2. _______: correct and true 3. _______: strong 4. _______: of or like people, not animals 5. _______: on the other side in a game, fight, etc. 6. _______: a group of things that work together 7. ______: grow bigger or stronger;become better 8. _______: give orders to a computer nearly accurate powerful human against system develop program

9. ________: use numbers to find answers calculate A _________ is a __________ machine. It helps people to _________ faster and more accurately because it can do a difficult ___________ in a flash. calculate(v.)计算 calculation(n.)计算 calculator(n.)计算器 calculating(adj.)计算的 calculator calculating calculate calculation

10. _______: make for the first time invent invent (v.)发明 inventor (n.)发明家 Benjamin Franklin was a famous ________ .He __________ the lightning rod（避雷针).It is a great ____________. invention (n.)发明 inventor invented invention

11. ________: that are going to be mentioned next following Can you answer the __________ questions? _________ me please. I’ll show you the way. following (adj.)下列的 follow (v.)跟随 following Follow

12. _______: not dead living living (adj.)活着的 live (v.)生活 Can all ___________ things __________ for several days without food? 13. ________ : very surprising We felt __________ when we read the ________ story. living live amazing amazing (adj.)令人惊奇的 amazed (adj.)感到惊奇的 amazed amazing

Revision of the phrases Say the phrases according to the meanings 1. ______________:long,long ago 2. ______________: not less than 3. ______________: in a very short time 4. ______________:not in the same way 5.__________________:in all one’s life 6. ______________: work out the problem in ancient times at least in a flash in different ways in one’s whole lifetime solve the problem

at least in a flash in ancient times in different ways solve the problem in one’s whole lifetime 1. We can use water _______________, such as washing clothes or cooking food. 2. Li Bai was a great poet who lived _____________. 3. It took us one hour to ______________ in different ways in ancient times solve the problem

at least in a flash in ancient times in different ways solve the problem in one’s whole lifetime 4. Your teacher looks old. He must be _________ 50 years old. 5. My father lived in China _______________. 6. The computer finished the calculation ____________. at least in his whole lifetime in a flash

Keep the same meaning of each sentence Revision of the sentence structures Keep the same meaning of each sentence 1. I spent two days doing this job. It ______ me two days _____ do this job. 2. He is strong. He can carry the heavy suitcase. He is _____ strong ______ he can carry the heavy suitcase. He is strong ______ ______ carry the heavy suitcase. took to that so enough to

3. The coat is expensive. He can’t buy it. The coat is ______ expensive for him ______ buy. The coat is not ______ ______ for him to buy. so that too to cheap enough

Read the text

Revision of the Passage Answer the questions about the text What did people write in many different ways? 2. In what way did people count? 3. Who invented the zero? 4. Why was the zero a very important invention? People wrote numbers in many different ways. People counted in tens. The Indians invented the zero. Because it made it easier to write big numbers and to calculate.

5. Which was one of the first calculating machines? 6. Why do people still use abacuses today? 7. What can a modern electronic calculator do? 8. Why do we say computers are very powerful? One of the first calculating machines was an abacuse. Because they are fast and accurate. It can add, subtract, multiply and divide. It can also calculate percentages and square roots. Because it can do a calculation that you could not do in your whole lifetime in a flash.

9. How long did Shakuntala’s brain take to find the answer? Shakuntala’s brain took fifty seconds to find the answer.

Fill in the blanks according to the passage Everyone knows the international ________ of numbers. In ancient times, numbers were written in ________ ways, but counting was nearly always in _____. Everyone uses the number _______ 1 to 9 plus zero. The system was invented by the Indians. _______ makes it easier to write big numbers and to _________. language different tens system Zero calculate

There are three calculating machines, the abacus, the modern ________ calculator and the computer. Which is more powerful, the computer or the human ________? There was a competition between an amazing lady who is from ______ and a powerful computer. However, the lady won. Her brain ______ less time to find the answer, like _______. Computers can’t do anything by themselves. Someone had to first ________ the computer. electronic brain India took lightning program

What is each part mainly about? P1: different ways of writing ancient numbers P2: the system of numbers P3: three calculating machines P4: a powerful living computer

Group discussion calculate find play buy In what way can computers help us in daily life? calculate find play buy talk study teach keep type print draw solve help….to… use…. to…. …….with….. make it easier to…..

Homework 1. Read and try to recite the text 2. Write a passage of at least 60 words on the topic “My views on the computer”

Goodbye