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  2. Mental calculation - Wikipedia

    en.wikipedia.org/wiki/Mental_calculation

    Mental calculation consists of arithmetical calculations using only the human brain, with no help from any supplies (such as pencil and paper) or devices such as a calculator. People may use mental calculation when computing tools are not available, when it is faster than other means of calculation (such as conventional educational institution ...

  3. Trachtenberg system - Wikipedia

    en.wikipedia.org/wiki/Trachtenberg_system

    The Trachtenberg system is a system of rapid mental calculation. The system consists of a number of readily memorized operations that allow one to perform arithmetic computations very quickly. It was developed by the Russian engineer Jakow Trachtenberg in order to keep his mind occupied while being a prisoner in a Nazi concentration camp.

  4. Mental abacus - Wikipedia

    en.wikipedia.org/wiki/Mental_abacus

    Mental calculation is said to improve mental capability, increases speed of response, memory power, and concentration power. Many veteran and prolific abacus users in China, Japan, South Korea, and others who use the abacus daily, naturally tend to not use the abacus any more, but perform calculations by visualizing the abacus.

  5. Number Sense (UIL) - Wikipedia

    en.wikipedia.org/wiki/Number_Sense_(UIL)

    Since Number Sense is designed to test students' mental math abilities, no calculators or scratch paper can be used during competition. In order for a question to be scored as correct the exact answer must be given (no allowance for rounding), except where the question is preceded by an asterisk, in which case for the question to be scored as ...

  6. Category:Mental calculation - Wikipedia

    en.wikipedia.org/wiki/Category:Mental_calculation

    Pages in category "Mental calculation" The following 5 pages are in this category, out of 5 total. This list may not reflect recent changes. ...

  7. Mental calculator - Wikipedia

    en.wikipedia.org/wiki/Mental_calculator

    A mental calculator or human calculator is a person with a prodigious ability in some area of mental calculation (such as adding, subtracting, multiplying or dividing large numbers). In 2005, a group of researchers led by Michael W. O'Boyle, an American psychologist previously working in Australia and now at Texas Tech University , has used MRI ...

  8. Number sense - Wikipedia

    en.wikipedia.org/wiki/Number_sense

    Researchers consider number sense to be of prime importance for children in early elementary education, and the National Council of Teachers of Mathematics has made number sense a focus area of pre-K through 2nd grade mathematics education. [7] An active area of research is to create and test teaching strategies to develop children's number sense.

  9. Robert Fountain (mental calculator) - Wikipedia

    en.wikipedia.org/wiki/Robert_Fountain_(mental...

    Robert Fountain (born in 1969) is a British mental calculator. He won the first Mental Calculation World Cup in 2004 and the second Mental Calculation World Cup in 2006. [1] [2] [3] In 1999 he was recognised by the Mind Sports Organisation as the first Grandmaster of Mental Calculation. Fountain was inspired to take up mental calculation as a ...

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