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Donkey Kong Jr. Math (Donkey Kong Jr. no Sansuu Asobi in Japan) is a game released for the Famicom and Nintendo Entertainment System. The game is an unlockable in the game, Animal Crossing. The game was also ported to the Virtual Console.
The game features one player and two player modes. In the one player mode, the objective is to enter math answers in order to receive points. In the two player mode, each player applies a math operation (addition, subtraction, multiplication, or division) to the number they have to make it another number, trying to eventually reach a mutual goal number. However, signs and numbers are on the same field for each player, and they must race to reach the final number. The identity of player 2 is vague, but it appears to be Donkey Kong's other son, and it is known only as Junior.