初一在整个初中阶段很重要，有扎实的基础，会使学习更加轻松。下面就为您推荐内容 The world of numbers 课堂练习 。希望您学习成绩突飞猛进。

The world of numbers 课堂练习

一.翻译下列短语

1.古代 ____________________ 2. 许多不同的方法 _______________

3.数字体系 ________________ 4. 由……组成 ___________________

5.计算器___________________ 6. 计算 _________________________

7.一瞬间___________________ 8. 能够 _________________________

9.一生_____________________ 10. 人脑 ________________________

二.完成下列句子

1.印度人首先发明并发展了1-9数字体系。后来他们又发明了零这个数字。

The Indians first ___________ and developed the 1 ___________ 9 system of numbers.

Then they invented the z____________.

2.(零的发现)使得写大的数字和计算变得更容易。

It made _____________ easier ____________ big numbers and to _____________.

3.现代的计算器可以计算加、减、乘、除，还可以算百分比和平方根。

The modern ___________ can add, ____________ , ____________and __________.

It can also ___________ percentages and _______________.

4. 电脑可以在一瞬间进行计算，而你有可能一辈子都算不出来。

A computer can do a _____________ in a ___________ , but you might not be ___________ to do in your ___________ lifetime.

5.一些人把人脑叫做活电脑。人脑比电脑更强大吗?

Some people ____________ the brain a ________________ computer.

Is a human brain more _____________ _______________ a computer?

三.短文填词

Shakuntala Devi is from India. She has an a___________ (1) brain and can calculate like l__________ (2). In America, Shakuntala and a very powerful computer were given a problem to s__________ (3). Shakuntala’s brain t_________ (4) 50 seconds to find the answer. The computer took a m__________(5). However, before the computer could begin c_________ (6), someone had to s________(7) many hours programming it with i________________(8) . No one had to p___________ (9) Shakuntala. Is your brain powerful e__________(10) to be against the computer?

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