There are techniques allowing to develop mathematical opportunities of a human brain in general and techniques of calculation of works of multidigit numbers in particular. As well as there are people with brains which from the birth have such opportunities. However people should find works of numbers in absolute majority of cases without advanced mathematical abilities. Below the simplest and effective opportunities which are available to them are described.
Instruction
1. Use knowledge of the multiplication table and the short-term memory - often it enough for finding of the work of two two-place numbers in mind. If necessary it is possible to break a multiplier into several categories, to increase a multiplicand by the turned-out numbers and to put results. For example, if it is necessary to increase 325 by 115, then the multiplier can be broken into numbers 100, 10 and 5. Do not try to keep everything in memory, write down intermediate results, your purpose is to solve a problem, but not to observe the principle of multiplication in mind.
2. Use school skills of multiplication in a column if they did not disappear from the head yet and near at hand there are a writing tool and paper.
3. If you have an access to the computer, then it means that also the standard calculator which is built in the operating system is available to you. In Windows OS for its start press the win key, pass into the section "All Programs", open the subsection "Standard", enter the section "Office" and select the Calculator item. The interface of this application is very simple and operation of finding of the work of two numbers with its help of complexity does not represent - enter a multiplicand, press a key with an asterisk, enter a multiplier and press enter.
4. If you have an Internet access, then it is possible to do not only without calculator, but also without computer - the mobile phone suffices. Pass to the homepage of the Google search engine and enter arithmetic operation which result you need to know instead of a search query. For example, if it is necessary to find the work of numbers 325 and 115, then enter 325 * 115. The calculator which is built in search engine will calculate and will show you result of operation. The same calculator is built in also the search engine Nigma.
5. Do not forget and about existence of the calculator which is built in the mobile phone - today seldom what model of this device has no it. Finding of the work of two numbers in this case is carried out by pressing of the same keys, as in the program calculator described above.