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2. 24 (puzzle) - Wikipedia

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

   The original version of 24 is played with an ordinary deck of playing cards with all the face cards removed. The aces are taken to have the value 1 and the basic game proceeds by having 4 cards dealt and the first player that can achieve the number 24 exactly using only allowed operations (addition, subtraction, multiplication, division, and parentheses) wins the hand.

3. Keisan Game - Wikipedia

   en.wikipedia.org/wiki/Keisan_Game

   The core focus on this video game is exclusively on multiplication (かけざん) and division (わりざん). No addition or subtraction facts are taught in this game. Primarily meant for educational purposes, there is little variety. Four modes are utilized, two for multiplication and two for division.

4. Number Munchers - Wikipedia

   en.wikipedia.org/wiki/Number_Munchers

   The game was designed for school and home use for grades four to eight with parental controlled options to set the difficulty level. [5] It teaches multiples, factors, prime numbers, equalities, and inequalities. It helped introduce math skills to younger students, [6] while helping older students to reinforce their existing math skills. [7]

5. Basic Math (video game) - Wikipedia

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

   Basic Math is an educational video game for the Atari Video Computer System (Atari VCS). [a] The game was developed at Atari, Inc. by Gary Palmer.The game involves a series of ten arithmetic problems involving addition, subtraction, multiplication, or division.

6. Multiplication - Wikipedia

   en.wikipedia.org/wiki/Multiplication

   The carry step of the multiplication can be performed at the final stage of the calculation (in bold), returning the final product of 45 × 256 = 11520. This is a variant of Lattice multiplication. The modern method of multiplication based on the Hindu–Arabic numeral system was first described by Brahmagupta. Brahmagupta gave rules for ...

7. Elementary arithmetic - Wikipedia

   en.wikipedia.org/wiki/Elementary_arithmetic

   Multiplication is a mathematical operation of repeated addition. When two numbers are multiplied, the resulting value is a product. The numbers being multiplied are multiplicands, multipliers, or factors. Multiplication can be expressed as "five times three equals fifteen," "five times three is fifteen," or "fifteen is the product of five and ...