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  2. Counting - Wikipedia

    en.wikipedia.org/wiki/Counting

    Number blocks, which can be used for counting. Counting is the process of determining the number of elements of a finite set of objects; that is, determining the size of a set. . The traditional way of counting consists of continually increasing a (mental or spoken) counter by a unit for every element of the set, in some order, while marking (or displacing) those elements to avoid visiting the ...

  3. Location arithmetic - Wikipedia

    en.wikipedia.org/wiki/Location_arithmetic

    The largest counter is in the 1024 position so the first counter is placed on the dot found by moving down the 1024 diagonal (at the 32,32 position). Subtracting this value (1024) from the original number leaves counters at 128, 64, 16, 4 and 2 (= 214).

  4. Counting board - Wikipedia

    en.wikipedia.org/wiki/Counting_board

    By using counters or tokens on a board with designated sections, people could easily keep track of quantities, trade, and financial transactions. [3] This invention not only enhanced accuracy but also fueled the development of more sophisticated mathematical concepts and systems throughout history.

  5. Chisanbop - Wikipedia

    en.wikipedia.org/wiki/Chisanbop

    The Chisanbop system. When a finger is touching the table, it contributes its corresponding number to a total. Chisanbop or chisenbop (from Korean chi (ji) finger + sanpŏp (sanbeop) calculation [1] 지산법/指算法), sometimes called Fingermath, [2] is a finger counting method used to perform basic mathematical operations.

  6. Tally marks - Wikipedia

    en.wikipedia.org/wiki/Tally_marks

    Tally marks on a chalkboard Counting using tally marks at Hanakapiai Beach. The number shown is 82. Tally marks, also called hash marks, are a form of numeral used for counting. They can be thought of as a unary numeral system.

  7. Abacus - Wikipedia

    en.wikipedia.org/wiki/Abacus

    Blind students can also complete mathematical assignments using a braille-writer and Nemeth code (a type of braille code for mathematics) but large multiplication and long division problems are tedious. The abacus gives these students a tool to compute mathematical problems that equals the speed and mathematical knowledge required by their ...

  8. Counting measure - Wikipedia

    en.wikipedia.org/wiki/Counting_measure

    In mathematics, specifically measure theory, the counting measure is an intuitive way to put a measure on any set – the "size" of a subset is taken to be the number of elements in the subset if the subset has finitely many elements, and infinity if the subset is infinite. [1]

  9. Tally counter - Wikipedia

    en.wikipedia.org/wiki/Tally_counter

    Most counters have four such rings, allowing the user to count up to 9999. A metal ring may be attached to aid in holding the counter, and usually half the ring is bent to allow it to fold flush with the counter when not in use. The counter is activated by pressing a button located above the screen. This causes the first ring to advance one number.

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