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He studied algebraic and geometric principles. He rewrote the textbook called the Nine Chapters On The Mathematical Art. He also had a key role in the decimal system. Without his knowledge to invent the number zero most mathematical calculations could not be possible. Negatives could not have been possible.

2.He rewrote a book that was destroyed in the burning of the books.

Citations

http://fabpedigree.com/james/grmatm1.htm

http://www.chacha.com/question/when-was-the-mathematician-chang-tshang-born-and-when-did-he-die

http://ecx.images-amazon.com/images/I/51MFA88ZNZL._SL500_AA300_.jpg

http://www.enchantedlearning.com/asia/china/map.GIF

Birth and Death

Chang Tshang was born in 200 bc in the country of Ancient China. That was the only country that he lived in his whole life.Tshang died in 142 bc in Ancient China.

What he contributed to

Chang Tshang

Some Intersting Facts

1.He helped think of the number zero.

3. He only lived for 58 years.

4. The only place he ever lived was Ancient China.

5. His book provided china with its mathematical texts for centuries.

This is a picture of the country where he lived, but I couldn't find a picture of him.

This is a newer copy of the book he helped write.

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