Monday, August 9, 2010

Basic operations about fractions

Let me give you some learning on the basics operations of fractions. Let us start with adding and subtracting fractions.

You can easily add or subtract like fractions means simply add or subtract the numerators and write the sum over the common denominator.

But before adding or subtracting unlike fractions you must find equivalent fraction with the same denominator like this:

First find the smallest multiple of both numbers and then rewrite the fractions as equivalent fraction with the LCM as the denominator.

When dealing with the fractions LCM is nothing but the Least Common denominator.

Some Adding fractions example:

4/8 + 2/8 = 6/8

5/10 + 8/10 = 13/10.


Adding and subtracting fraction with different denominator:

5/4 + 2/3

First convert each fraction into an equivalent fraction with the same denominator

12 be the equivalent denominator for 3 and 4

So (5*3 )/12 + (2*4)/12 = 15/12 + 8/12 = 23/12

In the same way subtracting fraction too.


Next we will concentrate on How to divide fractions:

To divide fractions take the reciprocal of the divisor and multiply the dividend

For example

First invert the fraction that you are dividing by :4/5÷3/7 = 4/5 * 7/3

Then multiply the numerators and denominators : 4/5 * 7/3 = 28/15

This was about fraction operations I guess now you are quite familiar with fractions.Here i am leaving one link to you to know about how to divide mixed numbers.

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