4.7 Multiplying Any 2 digit Numbers Together.4.6 Multiplying two 2 digit numbers between 11 and 19. 4.4 Multiplying by 10 (and powers of ten).4.3.1 Using hands: 1-10 multiplied by 9.1 Cognitive psychology and mental calculation.There are many different techniques for performing mental calculations, many of which are specific to a type of problem. Almost all such methods make use of the fact that we use the base 10 system. Although used to aid or quicken tedious computation, many also practice or create such tricks to impress their peers with their quick calculating skills. When a method is much faster than the conventional methods (as taught in school), it may be called a shortcut. Practically, mental calculations are not only helpful when computing tools are not available, but they also can be helpful in situations where it is beneficial to calculate with speed. Mental calculation is said to improve mental capability, speed of response, memory power and concentration. It is practiced as a sport in the Mind Sports Olympiad. Mental calculation is the practice of doing mathematical calculations using only the human brain, with no help from any computing devices. Please help to improve this page yourself if you can. This article needs rewriting to enhance its relevance to psychologists.
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