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  2. Clever Hans - Wikipedia

    en.wikipedia.org/wiki/Clever_Hans

    Clever Hans (German: der Kluge Hans; c. 1895 – c. 1916) was a horse that was claimed to have performed arithmetic and other intellectual tasks. After a formal investigation in 1907, psychologist Oskar Pfungst demonstrated that the horse was not actually performing these mental tasks, but was watching the reactions of his trainer.

  3. When Should Kids Learn to Read, Write, and Do Math? - WebMD

    www.webmd.com/parenting/features/when-should...

    second grade: kids learn to add and subtract with double digits. third and fourth grades: kids learn to multiply and divide. Ages 11-13: learning math. Kids learn to: perform more complex math ...

  4. Glossary of mathematical symbols - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_mathematical...

    Glossary of mathematical symbols. A mathematical symbol is a figure or a combination of figures that is used to represent a mathematical object, an action on mathematical objects, a relation between mathematical objects, or for structuring the other symbols that occur in a formula. As formulas are entirely constituted with symbols of various ...

  5. Math Anxiety: How to Spot It and How to Cope - Healthline

    www.healthline.com/health/anxiety/math-anxiety

    According to the American Psychological Association (APA), math anxiety is a type of anxiety that happens in response to math or math-related situations. Math anxiety can cause a wide range of ...

  6. The Number Devil - Wikipedia

    en.wikipedia.org/wiki/The_Number_Devil

    261. ISBN. 0-8050-6299-8. The Number Devil: A Mathematical Adventure ( German: Der Zahlenteufel. Ein Kopfkissenbuch für alle, die Angst vor der Mathematik haben) is a book for children and young adults that explores mathematics. It was originally written in 1997 in German by Hans Magnus Enzensberger and illustrated by Rotraut Susanne Berner.

  7. Does Reading Make You Smarter? 7 Things to Know - Healthline

    www.healthline.com/health/does-reading-make-you...

    6. It can improve brain health. Books put knowledge directly into your hands (or ears, in the case of audiobooks). Yet all the knowledge in the world may have little benefit when you have trouble ...

  8. Collatz conjecture - Wikipedia

    en.wikipedia.org/wiki/Collatz_conjecture

    (more unsolved problems in mathematics) Directed graph showing the orbits of small numbers under the Collatz map, skipping even numbers. The Collatz conjecture states that all paths eventually lead to 1. The Collatz conjecture [a] is one of the most famous unsolved problems in mathematics. The conjecture asks whether repeating two simple arithmetic operations will eventually transform every ...

  9. Table of mathematical symbols by introduction date - Wikipedia

    en.wikipedia.org/wiki/Table_of_mathematical...

    integral sign. : colon (for division ) 1684 (deriving from use of colon to denote fractions, dating back to 1633) ·. middle dot (for multiplication ) 1698 (perhaps deriving from a much earlier use of middle dot to separate juxtaposed numbers) ⁄. division slash (a.k.a. solidus )

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