The fraction is a special form of record of a rational number. It can be presented, both in decimal, and in an ordinary look. Kids from the fifth class are engaged in transformation of fractions, this operation has huge applied value which is useful to them both in mathematics, and in other fields of knowledge.
It is required to you
- The textbook on mathematics for the 5th class
Instruction
1. One of transformations of fractions is their translation from mixed in wrong. Let's remind that the mixed fraction consists of an integer and a proper fraction. So, to execute this transformation it is necessary: 1) To increase a fraction denominator by the whole part.2) To the received number to add numerator.3) Then the denominator remains invariable, and in numerator write down the number received in Paragraph 2. Example: 2(3/7) = (14+3)/7 = 17/7
2. Also such transformation can be executed in a different way: 1) Present the mixed fraction in the form of the sum of its whole and fractional part.2) Present the whole part in the form of an improper fraction) Put with the denominator corresponding to a denominator of a fractional part of the mixed fraction.3 correct and wrong split up. The result will be a required improper fraction. Example: 2(3/7)=2+3/7=14/7+3/7=(14+3)/7=17/7
3. If you need to transform a common fraction to decimal, then divide fraction numerator into its denominator. Example: 4/9=0.44444=0,(4) 1/4=0.25tut it should be added that at division, the result can turn out both end (an example 2), and infinite (an example 1) we Will remind that the decimal fraction is a fraction which denominator contains the whole degree of number ten. The form of record, this type of fraction, differs from record ordinary. In it at first write down that number which has to be in numerator, and then transfer a comma to a certain number of signs to the left. This number corresponds to the category of a denominator. Example: 678/10=67.8678/100=6.78678/1000=0.678678/10000=0.0678
4. To carry out transition from decimal fraction to ordinary it is necessary: 1) Take out the whole part for the sign of fraction.2) Write down in number numerator after a comma, and in a denominator ten in the corresponding category. Example: 1) 23.65=23(65/10^2)=23(65/100)=23(13/20)2) 40.1=40(1/10)
5. In order that to make fraction of ordinary number, present this number in the form of private two numbers. The dividend, at the same time, will be numerator, and a divider a denominator. Example: 8=16/2=8/1=24/3