zero

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29 07, 2017

What is zero? Zero and place value

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 [...]

29 07, 2017

Numbers and math

A number line is infinite in both directions. Numbers are a convenient way for people to organize their thoughts about space and time. First we can think of zero as a point, taking up no [...]

29 07, 2017

What are fractions? – Math

A fraction of a pie: What are fractions? We started with whole numbers When we first thought about the number line, we counted only in whole numbers - we went straight from zero [...]

29 07, 2017

Decimals and fractions – Numbers

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 [...]

22 07, 2017

Invention of Zero – Indian Numbers

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, [...]

22 07, 2017

Ancient Indian Science and Math

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 [...]

20 07, 2017

Guptan Empire in Ancient India

By |2019-07-29T12:04:31-07:00July 20th, 2017|History, India|0 Comments

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. [...]

7 06, 2017

Math and Numbers in Ancient China

By |2019-10-15T09:08:44-07:00June 7th, 2017|China, Science|0 Comments

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 [...]