Forget whether we multiplication table?

First class 

- Petrov, so how much will his family eight?

The boy clings to her small little eyes for the second installment of the third row. He did not even breathing, trying something to consider.

- So, seven, eight? - Monotone teacher continues.

- Five ... ten ...

- Well, go on.

- Eight ... Fifty-eight! - Petrov, exclaims with relief.

Teacher seriously shakes his head ...

Change

Little puny fists Petrov comes on thick classmate. He backs away in fright to the window.

- Do you have shown me? - Hissing hurt.

- Calculator junk - trying to justify his back to the windowsill. - I figure "six" is similar to the "eight" ...

Calculators

When they were gone, nothing remained but to take it orally or, if possible, a "whisker" on paper. Vendors typically use the account. I'm so out of school hours and did not understand how scores can accelerate the process. Subsequently, the computer seemed to me much more convenient and easier. Seller Account is now hardly seen. All calculators - and in mobile phones, and any computing.

Even the simplest of people try to make them. The more they are using, the harder it is to gather ideas for the elementary numeric. The order is not transmitted to the head, and fingers that are willing to quickly find key and set the corresponding arithmetic operations. "Entering" - and you're done - on the screen the desired amount. No need to strain the brains and think, mistaken or not mistaken.

Previously, highly valued person who can make a quick calculation in my head. This speeded up their work orientation in numbers, particularly in accounting. We have all reduced to "no" calculator or computer, if calculations rather complicated. The program for the second will find all the necessary data, make actions on them, but also will give a nice printout.

So I ask, why learn long division and square root? Is not it easier to keep this knowledge a professional mathematicians? Anyway, we can calculate using a fountain pen is not all. In the 12th degree we are the number hardly we raise, let alone root out it does not calculate all the more. Do not use the same we are in everyday life and legacy of Fourier Gale kin! And just take it in a column do not, then why waste time on the multiplication table? An outraged reader, perhaps, burst out: "How so? This is the cornerstone! Without it, anywhere.

Do not worry, I do think so. In any case, to draw conclusions too early. But the future with incredible speed to catch a all-powerful technology. You can learn a lot and is well known, but never used. It would not be necessary. Even the multiplication table, as well as much basic arithmetic, can become archival material in the most remote corners of memory. We did not study the obsolete technology of the past. Some of them even lost.

And, in general, what part of the received at school and at the Institute of knowledge do we use? Have you ever thought? Scanty. And why should we rest? For the overall development? Know where and what is, and what really exists? Is reasonable.

One thing is clear: through a column are not relevant. Almost always at hand are computing devices. And oral?

Mental calculation

It is divided into two categories: exact and is clash (approximate). Accurate - has just outlived its usefulness. Unless there is someone to practice a hobby brains. Is clash - is another matter. It is often necessary to quickly evaluate your potential for a major purchase or in a business conversation. That the costs that goes into taxes, and, finally, what is the net profit. Precision here is not necessary. Rough, rough estimate - and it is clear how to do next. Just then help and arithmetic, and multiplication tables.

At the Institute our mathematics teacher had the ability to quickly estimate the result in the complex example. On the blackboard is depicted polynomial, each element of which is the numerator and denominator. Those, in turn, dotted with fractions, square and cube roots. Lecturer, no straining, roughly calculated the result, where rounding, where throwing a fractional part. Classmates noticed that the number obtained in this way, always similar to the response up to the unit.

True and a rough calculation can also be done using the calculator.

What is still further?

No problem. All will be resolved naturally. Will need, calculate, and in the column. But doubt that will happen - almost always next to the calculator. If not, the mobile phone certainly present. Suitable and a laptop. Why would the head with such a technique? But the multiplication table we, of course, is unlikely to forget.

Finished another story. Three pages. His printer is not. I go to the nearest internet club and hand flash. The cost of one sheet - 40 cents.