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Science,English,and math Ⅱ

No.35　17/04/30 17:51
燻し銀三 ( 50代 ♂ Oe38xe ) あ+あ-

【Expansion to an irrational number】

《The concept of the number extends from the four basic operation of arithmetic to rational number》

Without any remainder no one can figure within the range of integral numbers,so if wanting to divide the one into three equally,we need to think up a new number,so we are forced to describe the number was one-third. In short a fractional number appears.

The fractional number of which both of denominator 分母 and numerator 分子 are integral number is rational number. When natural number is extended to integral number,we've learned to do addition and subtraction at will,at the same time,when the integral number is extended to the rational number,we've learned to do multiplication and division at will.

In this way the system of rational number in which we can do the four basic operation of arithmetic is completed,so we can add,subtract,multiple and divide at will.

There are two simple question as to the four basic operation of arithmetic on the…