# abacus

16 09, 2017

## West Asian mathematics – history of math

By |2020-11-08T16:47:23-08:00September 16th, 2017|West Asia|Comments Off on West Asian mathematics – history of math

History of math: Sumerian multiplication table (2700 BC) Cuneiform multiplication table Once people in West Asia figured out how to write down numbers, about 3500 BC, they quickly began to want to use cuneiform to [...]

4 09, 2017

## Roman numeral answers – Roman math

By |2017-09-04T21:37:29-07:00September 4th, 2017|Math, Romans|Comments Off on Roman numeral answers – Roman math

Roman tax collector calculating someone's taxes on an abacus (Metz, ca. 225 AD) Did you figure it out? Poor Claudia died when she was 25 years old, seven months, and [...]

4 08, 2017

## Medieval math in Europe

By |2017-08-04T13:22:07-07:00August 4th, 2017|Math, Medieval|Comments Off on Medieval math in Europe

Math was a very exciting subject to be working on during the Middle Ages in Europe. Little by little, math experts in Europe were learning from Islamic math experts about what we call Arabic numbers (0,1,2,3,4,5,6,7,8,9) (though the [...]

29 07, 2017

A number line is infinite in both directions. Adding numbers is like walking along a path, the number line. To add two small numbers, like 7 + 4, you can just [...]

9 06, 2017

## How to make an abacus – Ancient China project

By |2019-01-15T08:54:03-08:00June 9th, 2017|China, Crafts, Science|Comments Off on How to make an abacus – Ancient China project

Chinese abacus project, made by kids at Laurelhurst School, Portland, Oregon Who invented the abacus? People in China started to use an abacus to help them with math problems maybe [...]

7 06, 2017

## Math and Numbers in Ancient China

By |2019-10-15T09:08:44-07:00June 7th, 2017|China, Science|Comments Off on Math and Numbers in Ancient China

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 [...]

Go to Top