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Richard Shepherd Software was a British software house active between 1982 and 1985. The company was mainly known for releasing text adventure games. [ 1 ] These were programmed by Richard Shepherd himself and Pete Cooke .
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.
In a January 1983, review the British computer games magazine TV Gamer described the game as "certainly a lot more entertaining than its predecessor, Basic Maths". [3] A review in the January 1983 edition of Tilt magazine, a French video games magazine, gave the game 2/6 for graphics and 4/6 for interest, saying that the game might even be of interest to adults.
When implemented in software, long multiplication algorithms must deal with overflow during additions, which can be expensive. A typical solution is to represent the number in a small base, b, such that, for example, 8b is a representable machine integer. Several additions can then be performed before an overflow occurs.
Multiplication can also be thought of as scaling. Here, 2 is being multiplied by 3 using scaling, giving 6 as a result. Animation for the multiplication 2 × 3 = 6 4 × 5 = 20. The large rectangle is made up of 20 squares, each 1 unit by 1 unit. Area of a cloth 4.5m × 2.5m = 11.25m 2; 4 1 / 2 × 2 1 / 2 = 11 1 / 4
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]