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  2. Number sentence - Wikipedia

    en.wikipedia.org/wiki/Number_sentence

    A valid number sentence that is true: 83 + 19 = 102. A valid number sentence that is false: 1 + 1 = 3. A valid number sentence using a 'less than' symbol: 3 + 6 < 10. A valid number sentence using a 'more than' symbol: 3 + 9 > 11. An example from a lesson plan: [6] Some students will use a direct computational approach.

  3. Hilbert's second problem - Wikipedia

    en.wikipedia.org/wiki/Hilbert's_second_problem

    In mathematics, Hilbert's second problem was posed by David Hilbert in 1900 as one of his 23 problems. It asks for a proof that arithmetic is consistent – free of any internal contradictions. Hilbert stated that the axioms he considered for arithmetic were the ones given in Hilbert (1900) , which include a second order completeness axiom.

  4. Word problem (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Word_problem_(mathematics)

    The word problem for an algebra is then to determine, given two expressions (words) involving the generators and operations, whether they represent the same element of the algebra modulo the identities. The word problems for groups and semigroups can be phrased as word problems for algebras. [1]

  5. Second-order logic - Wikipedia

    en.wikipedia.org/wiki/Second-order_logic

    Then sentences that were second-order become first-order, with the formerly second-order quantifiers ranging over the second sort instead. This reduction can be attempted in a one-sorted theory by adding unary predicates that tell whether an element is a number or a set, and taking the domain to be the union of the set of real numbers and the ...

  6. V2 word order - Wikipedia

    en.wikipedia.org/wiki/V2_word_order

    In syntax, verb-second (V2) word order [1] is a sentence structure in which the finite verb of a sentence or a clause is placed in the clause's second position, so that the verb is preceded by a single word or group of words (a single constituent).

  7. JumpStart 2nd Grade - Wikipedia

    en.wikipedia.org/wiki/JumpStart_2nd_Grade

    JumpStart 2nd Grade (known as Jump Ahead Year 2 in the United Kingdom) is a video game released on 26 March 1996 by Knowledge Adventure. As its name suggests, it was made to teach second grade students. It was replaced by JumpStart Advanced 2nd Grade in 2002.

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