Donkey Kong Jr. Math

Donkey Kong Jr. Math is an educational game in the Donkey Kong series for the Nintendo Entertainment System released in 1983. Donkey Kong will hold up a sign, and Donkey Kong Jr. must find the numbers and math sign to get to that number to get a point. A preview of this game was released as a compilation called Donkey Kong Jr. + Jr. Sansū Lesson which included both a prototype of Donkey Kong Jr. Math and Donkey Kong Jr. a few months earlier.

Donkey Kong Jr. Math was met with negative reviews and was the worst selling launch-title in North America. This game was recreated as an obtainable item in the game Animal Crossing and it was re-released the first time on the Virtual Console for the Wii (500 Wii Points) on September 3, 2007 and the Virtual Console for the Wii U ($4.99) in North America on August 28, 2014.

Donkey Kong Jr. Math was the only game to be released under the "Educational Series" label of North American NES titles. While Donkey Kong no Ongaku Asobi was intended to be released around the same time, it was canceled and no other educational games in the Donkey Kong series were made.

Gameplay
The game features a one and two player mode. In the single-player mode, the player's goal is to enter the answers to mathematical questions in order to receive points. The questions include addition, subtraction, multiplication and division. In the two player mode, both players control two Donkey Kong Juniors (a normal brown one and a pink one) that are on a race to create a math formula that equals the number shown by Donkey Kong. The gameplay is similar to that of Donkey Kong Jr.; players climb vines to reach higher areas. To create the math formulas, the player has to collect the numbers and the symbol(s) in the correct order that can be reached by using the vines.

Playable

 * Donkey Kong Jr.
 * Junior (II)

Non-playable

 * Donkey Kong
 * Nitpicker

References to other games

 * Donkey Kong Jr. - The game's cast, setting and many of its graphical elements are reused from its predecessor. In fact, the game's ROM image was copied and hacked directly from Donkey Kong Jr., as evidenced by the presence of unused Donkey Kong Jr.-exclusive graphics in the ROM, among other things.

References in later games

 * Donkey Kong Country Returns - Donkey Kong's sprite while holding a sign is reused as a background element in Wonky Waterway.
 * Super Smash Bros. for Nintendo 3DS / Wii U - Donkey Kong's pink alternate costume is a reference to Junior (II).