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  2. Subtraction game - Wikipedia

    en.wikipedia.org/wiki/Subtraction_game

    Subtraction games are generally impartial games, meaning that the set of moves available in a given position does not depend on the player whose turn it is to move.For such a game, the states can be divided up into -positions (positions in which the previous player, who just moved, is winning) and -positions (positions in which the next player to move is winning), and an optimal game playing ...

  3. Save American wetlands with this student-made Facebook game - AOL

    www.aol.com/news/2012-01-19-uwb-wetlands...

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  4. Elementary arithmetic - Wikipedia

    en.wikipedia.org/wiki/Elementary_arithmetic

    A subtraction problem such as is solved by borrowing a 10 from the tens place to add to the ones place in order to facilitate the subtraction. Subtracting 9 from 6 involves borrowing a 10 from the tens place, making the problem into 70 + 16 − 39 {\displaystyle 70+16-39} .

  5. Wetlands (video game) - Wikipedia

    en.wikipedia.org/wiki/Wetlands_(video_game)

    A reviewer for Next Generation scored the game two out of five stars, contending that rail shooters as a whole are too simplistic to be of much value. However, he admitted that Wetlands is one of the better examples of the genre, since its traditional cel animation realistically models human movements, there are many good humorous touches, and the plot is more inventive and unpredictable than ...

  6. Wetland conservation - Wikipedia

    en.wikipedia.org/wiki/Wetland_conservation

    A wetland (aerial view) Wetland conservation is aimed at protecting and preserving areas of land including marshes, swamps, bogs, and fens that are covered by water seasonally or permanently due to a variety of threats from both natural and anthropogenic hazards. Some examples of these hazards include habitat loss, pollution, and invasive species.

  7. Wetlands of the United States - Wikipedia

    en.wikipedia.org/wiki/Wetlands_of_the_United_States

    The Wetlands Geodatabase and the Wetlands Mapper, as an Internet discovery portal, provide technological tools that allow the integration of large relational databases with spatial information and map-like displays. The information is made available to an array of federal, state, tribal, and local governments and the public.