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  2. Counting rods - Wikipedia

    en.wikipedia.org/wiki/Counting_rods

    Moving the batch of rods representing 9 to the left one position (i.e., to the tens place) gives 9[] or 90. Shifting left again to the third position (to the hundreds place) gives 9[][] or 900. Each time one shifts a number one position to the left, it is multiplied by 10. Each time one shifts a number one position to the right, it is divided ...

  3. Rod calculus - Wikipedia

    en.wikipedia.org/wiki/Rod_calculus

    Two vertical rods represent 2, and so on, until 5 vertical rods, which represents 5. For number between 6 and 9, a biquinary system is used, in which a horizontal bar on top of the vertical bars represent 5. The first row are the number 1 to 9 in rod numerals, and the second row is the same numbers in horizontal form. For numbers larger than 9 ...

  4. Counting Rod Numerals - Wikipedia

    en.wikipedia.org/wiki/Counting_Rod_(Unicode_block)

    Counting Rod Numerals is a Unicode block containing traditional Chinese counting rod symbols, which mathematicians used for calculation in ancient China, Japan, Korea, and Vietnam.

  5. Suzhou numerals - Wikipedia

    en.wikipedia.org/wiki/Suzhou_numerals

    The Suzhou numeral system is the only surviving variation of the rod numeral system. The rod numeral system is a positional numeral system used by the Chinese in mathematics. Suzhou numerals are a variation of the Southern Song rod numerals. Suzhou numerals were used as shorthand in number-intensive areas of commerce such as accounting and ...

  6. Glossary of cue sports terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_cue_sports_terms

    In other games, such as eight-ball, the 10 is simply one of the regular object balls. 11 ball Also the 11. The object ball numbered 11; in American-style pool ball sets, it is striped red. 12 ball Also the 12. The object ball numbered 12; in American-style pool ball sets, it is striped purple or rarely pink 13 ball Also the 13.

  7. Chinese multiplication table - Wikipedia

    en.wikipedia.org/wiki/Chinese_multiplication_table

    The Tsinghua Bamboo Slips, containing the world's earliest decimal multiplication table, dated 305 BC during the Warring States period. The Chinese multiplication table is the first requisite for using the Rod calculus for carrying out multiplication, division, the extraction of square roots, and the solving of equations based on place value decimal notation.

  8. Chinese numerals - Wikipedia

    en.wikipedia.org/wiki/Chinese_numerals

    For the numbers 11 through 19, the leading 'one' (一; yī) is usually omitted. In some dialects, like Shanghainese, when there are only two significant digits in the number, the leading 'one' and the trailing zeroes are omitted. Sometimes, the one before "ten" in the middle of a number, such as 213, is omitted. Thus:

  9. List of Chinese inventions - Wikipedia

    en.wikipedia.org/wiki/List_of_Chinese_inventions

    Counting rods: Counting rods are instruments used for performing calculations, which uses a grid of cells to represent a decimal position system. Each digit (0–9) appears as a tally of rods with red rods designated as positive numbers and black rods designated as negative numbers. [144]