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2. Pinwheel (TV series) - Wikipedia

   en.wikipedia.org/wiki/Pinwheel_(TV_series)

   Pinwheel is an American children's television series that was the first show to air on the then-rebranded Nickelodeon, as well as the first to appear on its Nick Jr. block along reruns until 1990. The show was aimed at preschoolers aged 3–5. [1] It was created by Vivian Horner, [2] an educator who spent her earlier career at the Children's ...

3. 24 (puzzle) - Wikipedia

   en.wikipedia.org/wiki/24_(puzzle)

   24 (puzzle) The 24 puzzle is an arithmetical puzzle in which the objective is to find a way to manipulate four integers so that the end result is 24. For example, for the numbers 4, 7, 8, 8, a possible solution is . Note that all four numbers must be used exactly once. The problem has been played as a card game in Shanghai since the 1960s, [1 ...

4. Plus and minus signs - Wikipedia

   en.wikipedia.org/wiki/Plus_and_minus_signs

   The plus sign (+) and the minus sign (−) are mathematical symbols used to denote positive and negative functions, respectively. In addition, + represents the operation of addition, which results in a sum, while − represents subtraction, resulting in a difference. [1] Their use has been extended to many other meanings, more or less analogous.

5. Ninety-nine (addition card game) - Wikipedia

   en.wikipedia.org/wiki/Ninety-nine_(addition_card...

   Ninety-nine is a simple card game based on addition and reportedly popular among the Romani people. [1] It uses one or more standard decks of Anglo-American playing cards in which certain ranks have special properties, and can be played by any number of players. During the game, the value of each card played is added to a running total which is ...

6. Elementary arithmetic - Wikipedia

   en.wikipedia.org/wiki/Elementary_arithmetic

   Elementary arithmetic is a branch of mathematics involving addition, subtraction, multiplication, and division. Due to its low level of abstraction, broad range of application, and position as the foundation of all mathematics, elementary arithmetic is generally the first branch of mathematics taught in schools. [1][2]

7. Plus–minus sign - Wikipedia

   en.wikipedia.org/wiki/Plus–minus_sign

   The plus–minus sign or plus-or-minus sign, ±, is a symbol with multiple meanings. In mathematics , it generally indicates a choice of exactly two possible values, one of which is obtained through addition and the other through subtraction .