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Long, long ago there was no zero. To write the number sixty-three people wrot...
Long, long ago there was no zero. To write the number sixty-three people wrot...
admin
2020-12-24
31
问题
Long, long ago there was no zero. To write the number sixty-three people wrote 6 3. To write six hundred and three, people wrote 6 3. The space between six and three was there to mean." not any "tens. Sometimes people did not remember the space. It was hard to see and read.
Later people used a dot to hold the space. Six hundred and three looked like this 6.3. But the dot was hard to see. So people put a circle around it like this 6⊙3.
Then people could see the dot. They remembered the space. At last, only the circle around the dot was used. It was like a zero. This is one story of how the zero came to be used.
Now zero has many important uses. Zero tells how many. Can you tell some other ways of using zero?
选项
5、The story tells us ________.
A. how zero came to be used
B. how to write zero
C. what’s the use of zero
D. that zero means a dot, a circle or space
答案
A
解析
本文主要介绍了0是如何产生的。
转载请注明原文地址:https://ti.zuoweng.com/ti/BXB8KKKQ
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