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2. Kumon - Wikipedia

   en.wikipedia.org/wiki/Kumon

   Kumon (the company) gained 63,000 students over its first 16 years. In 1974, Kumon published a book titled The Secret of Kumon Math, leading to a doubling of its size in the next two years. [2] Kumon opened its first United States locations in 1983, [3] and by 1985, Kumon reached 1.4 million students. [2]

3. Algebraic expression - Wikipedia

   en.wikipedia.org/wiki/Algebraic_expression

   In mathematics, an algebraic expression is an expression built up from constants (usually, algebraic numbers) variables, and the basic algebraic operations: addition (+), subtraction (-), multiplication (×), division (÷), whole number powers, and roots (fractional powers).

4. Toru Kumon - Wikipedia

   en.wikipedia.org/wiki/Toru_Kumon

   Toru Kumon (公文 公, Kumon Tōru, March 26, 1914 – July 25, 1995) was a Japanese mathematics educator. He was born in Kōchi Prefecture , Japan. He graduated from the College of Science at Osaka University with a degree in mathematics and taught high school mathematics in his home town of Osaka.

5. Multiplication - Wikipedia

   en.wikipedia.org/wiki/Multiplication

   Area of a cloth 4.5m × 2.5m = 11.25m 2; 4 ⁠ 1 / 2 ⁠ × 2 ⁠ 1 / 2 ⁠ = 11 ⁠ 1 / 4 ⁠ Multiplication (often denoted by the cross symbol × , by the mid-line dot operator ⋅ , by juxtaposition, or, on computers, by an asterisk * ) is one of the four elementary mathematical operations of arithmetic, with the other ones being addition ...

6. Order of operations - Wikipedia

   en.wikipedia.org/wiki/Order_of_operations

   For example, multiplication is granted a higher precedence than addition, and it has been this way since the introduction of modern algebraic notation. [2] [3] Thus, in the expression 1 + 2 × 3, the multiplication is performed before addition, and the expression has the value 1 + (2 × 3) = 7, and not (1 + 2) × 3 = 9.

7. Multiplication table - Wikipedia

   en.wikipedia.org/wiki/Multiplication_table

   In mathematics, a multiplication table (sometimes, less formally, a times table) is a mathematical table used to define a multiplication operation for an algebraic system. The decimal multiplication table was traditionally taught as an essential part of elementary arithmetic around the world, as it lays the foundation for arithmetic operations ...