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  2. Order of operations - Wikipedia

    en.wikipedia.org/wiki/Order_of_operations

    The order of operations, that is, the order in which the operations in an expression are usually performed, results from a convention adopted throughout mathematics, science, technology and many computer programming languages. It is summarized as: [2] [5] Parentheses; Exponentiation; Multiplication and division; Addition and subtraction

  3. Khan Academy - Wikipedia

    en.wikipedia.org/wiki/Khan_Academy

    Khan Academy is an American non-profit [3] educational organization created in 2006 by Sal Khan. [1] Its goal is to create a set of online tools that help educate students. [4] The organization produces short video lessons. [5] Its website also includes supplementary practice exercises and materials for educators.

  4. ABCya - Wikipedia

    en.wikipedia.org/wiki/ABCya

    ABCya.com was founded in 1996 by Alan Tortolani. [2] A public school teacher, Tortolani created his own activities for his students. Later, he decided to register a domain under ABCya.com. Tortolani chose this particular domain name "ABCya" to make it accessible to children and easy to type into a web browser.

  5. List of educational video websites - Wikipedia

    en.wikipedia.org/wiki/List_of_educational_video...

    Educational courses with lectures, quizzes and exams provided by universities for free. Certificates are provided by the respective university on successful completion of a course. Free ? Coursera: Crash Course (YouTube) Multidisciplinary Educational courses in physical and social sciences, philosophy, history, culture and literature. Free ?

  6. Ready-to-Learn - Wikipedia

    en.wikipedia.org/wiki/Ready-to-Learn

    The Ready-To-Learn (RTL) Act is a project funded by PBS and the Corporation for Public Broadcasting (CPB) to supply educational programming and materials for preschool and elementary school children. Created in 1992, the Ready-To-Learn Act furthered the creation of the Ready-To-Learn programming block which provided eleven hours of educational ...

  7. Starfall (website) - Wikipedia

    en.wikipedia.org/wiki/Starfall_(website)

    Starfall was founded on August 27, 2002, [3] by Stephen Schutz, his wife Susan Polis Schutz, and their son, Jared Schutz Polis. [2] [1] Starfall arose from Blue Mountain Arts, a publishing house in Boulder, Colorado founded by Stephen Schutz.

  8. Elementary arithmetic - Wikipedia

    en.wikipedia.org/wiki/Elementary_arithmetic

    The order in which the addends are added does not affect the sum. This is known as the commutative property of addition. (a + b) and (b + a) produce the same output. [7] [8] The sum of two numbers is unique; there is only one correct answer for a sums. [8]

  9. Operator-precedence parser - Wikipedia

    en.wikipedia.org/wiki/Operator-precedence_parser

    In computer science, an operator-precedence parser is a bottom-up parser that interprets an operator-precedence grammar.For example, most calculators use operator-precedence parsers to convert from the human-readable infix notation relying on order of operations to a format that is optimized for evaluation such as Reverse Polish notation (RPN).

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