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  2. 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.

  3. Cuisenaire rods - Wikipedia

    en.wikipedia.org/wiki/Cuisenaire_rods

    Cuisenaire rods illustrating the factors of ten A demonstration the first pair of amicable numbers, (220,284). Cuisenaire rods are mathematics learning aids for pupils that provide an interactive, hands-on [1] way to explore mathematics and learn mathematical concepts, such as the four basic arithmetical operations, working with fractions and finding divisors.

  4. ABCya - Wikipedia

    en.wikipedia.org/wiki/ABCya

    ABCya.com, L.L.C. (also stylized as ABCya!) is an American website that provides educational games and activities for school-aged children. The games on the website are organized into grade levels from pre-kindergarten to Sixth grade, as well as into subject categories such as letters, numbers, and holidays.

  5. Trachtenberg system - Wikipedia

    en.wikipedia.org/wiki/Trachtenberg_system

    Some of the algorithms Trachtenberg developed are ones for general multiplication, division and addition. Also, the Trachtenberg system includes some specialised methods for multiplying small numbers between 5 and 13. The section on addition demonstrates an effective method of checking calculations that can also be applied to multiplication.

  6. Mental calculation - Wikipedia

    en.wikipedia.org/wiki/Mental_calculation

    As the n digit multiplication problem grows to ever larger numbers, the number of possible combinations one can use to reach the same answer grows as well; meaning the user can pick and choose the easiest and fastest route to reach the answer to each multiplication problem according to their own specific needs at the time.

  7. Blue's Clues Kindergarten - Wikipedia

    en.wikipedia.org/wiki/Blue's_Clues_Kindergarten

    Periwinkle is nervous about going to school. To help him, Blue and Joe turn Blue's house into a make-believe kindergarten with games about science, math, rhyming, art, and more. Choose from five games with Blue, Joe, and friends, while three adjustable levels of difficulty match children's growth.

  8. List of impossible puzzles - Wikipedia

    en.wikipedia.org/wiki/List_of_impossible_puzzles

    It is impossible to solve in half of the starting positions. [1] Five room puzzle – Cross each wall of a diagram exactly once with a continuous line. [2] MU puzzle – Transform the string MI to MU according to a set of rules. [3] Mutilated chessboard problem – Place 31 dominoes of size 2×1 on a chessboard with two opposite corners removed ...

  9. Big Thinkers (video game series) - Wikipedia

    en.wikipedia.org/wiki/Big_Thinkers_(video_game...

    Many mini games are available in both games, but in each game they are different. The house lay-out is the same except in Big Thinkers 1st Grade the woods is replaced with a garage. Big Thinkers! Kindergarten taught skills such as measurements, spelling, and letter identification. [5]

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