zero

/Tag: zero

Science in Central America and South America

By |2019-03-08T20:46:38-07:00September 10th, 2017|Central America, Science, South America|

A rubber ball made by the Olmec people (about 1000 BC) Invention of rubber With different natural resources available to them, the people of South America and Central America invented different things than the people of Europe, Asia, or Africa did. Early African science South America articles Central America articles One early invention was rubber. The Olmec people invented rubber (in fact the [...]

What is zero? Zero and place value

By |2017-07-29T17:35:52-07:00July 29th, 2017|Math|

A math problem showing place value How can you add big numbers without an abacus? You still group the sheep (or whatever) just as you did when you were using the abacus, but now you write the numbers down using place values, so that your hundreds are all underneath your other hundreds, your tens are underneath [...]

Decimals and fractions – Numbers

By |2017-07-29T14:49:06-07:00July 29th, 2017|Math|

A number line is infinite in both directions. Decimals, like fractions, are a way of describing points on the number line that fall in between the whole numbers. If you were using fractions, you'd say that the point halfway between 1 and 2 was 1 1/2. In decimals, you'd call that same point 1.5. Each digit after [...]

Invention of Zero – Indian Numbers – History of Mathematics

By |2018-09-19T20:53:13-07:00July 22nd, 2017|India, Math|

History of Math: Counting tokens from Mehrgarh in Late Stone Age India Indian counting tokens and base 10 The first Indian numbers appeared in the late Stone Age, about 4000 BC. Around this time, people at Mehrgarh began to use counting tokens. (People were already using these tokens in West Asia.) Where was Mehrgahr? Indian history articles Writing [...]

Ancient Indian Science and Math

By |2019-09-15T07:14:17-07:00July 22nd, 2017|India|

Ancient Indian science: Mohenjo Daro (ca. 2000 BC) From the time of the Harappans to the time of the Islamic conquests, Indian scientists and mathematicians were leaders. Ancient Indian science especially stood out in mathematics and engineering. Invention of zero History of steel Ancient India articles Harappan science and math in India The Harappans in 2500 BC had a sewage system at their [...]

Guptan Empire in Ancient India

By |2019-07-29T12:04:31-07:00July 20th, 2017|History, India|

Guptan Empire: Coin of Samudragupta Chandragupta builds an empire In 319 AD, King Chandragupta I managed to conquer all of northern India. He built northern India into a great empire again. (He was not related to the Mauryan Chandragupta. But he wanted people to think he was). Chandragupta I even conquered some of South [...]

Math and Numbers in Ancient China

By |2018-04-25T12:09:29-07:00June 7th, 2017|China, Science|

Chinese numbers: number rods Chinese numbers People in China were using written numbers by about 1500 BC, in the Shang Dynasty. This is about two thousand years later than people began to write numbers in West Asia. It's more than a thousand years later than people began to write numbers in India. Nobody knows whether [...]