i need the easeist way/rule on how to add,subtract,multiply and divide fractions?

Answer 1

Don't, math leads to more problems.

remember pemdas - parenthasis, exponents, multiply, divide, addition, subtraction - in that order. Thats all I got for you, it ain't much but it's a start.

Answer 2

To add two fractions:

As an example, let's use 1/7 + 3/5

(1) Give them a common denominator.

?/35 + ?/35

(2) Determine what the new value on top would be. Since the denominator of the first needed a 5 to complete it, you have to multiply the top by 5 as well. Similarly for the second number, it needed a 7 to complete it, so you have to multiply the top by 7.

(1*5)/35 + (3*7)/35
5/35 + 21/35

(3) Now, just add the numerators.
(5+21)/35 = 26/35

The same holds true for subtracting.

To multiply two fractions:

Let's use 1/7 x 3/5

Note: Multiplication is EXTREMELY simple, compared to addition and subtraction. All you have to do is multiply the numerators and multiply the denominators.
(1*3)/(7*5) = 7/15.

That's it!!

Divide fractions:

As an example, let's use 1/3 divided by 7/5.

To solve this, all you have to do is flip the second fraction, and then multiply. This flipping is called taking the reciprocal. Therefore

1/3 divided by 7/5

is the same as

1/3 times 5/7

And then you just use your simple rule of multiplying fractions and you get the following:

(1*5)/(3*7) = 3/35

Answer 3

All the good hints are here - just remember after you've added/subtracted/etc to SIMPLIFY the fraction, i.e. take out the common factors. Might be the difference between getting 99% on a question vs. 100%.

Example - it's all well and good to know that
1/4 + 3/4 = 4/4
but if you don't simplify it down to "1" the examiner will know that you're just following rote rules without knowing what's really going on!

Answer 4

if you want to add fractions you must have a common(bottom no.) denominator ie (7/8 + 3/4) = (7/8 + 6/8) = (13/8) = 1 5/8.
To subtract its the same ie (7/8 - 3/4) = (7/8 - 6/8) = 1/8.
To multiply I don't want to give you incorrect info. And divide.

Answer 5

with addition and subtraction all you have to do is get the same denominator, then add/subtract the numerator. To multiply all you have to do is multiply straight across(3/4x3/4=9/16) For division you make them into reciprocals, that means you switch them around(4/5 would become 5/4) then you multiply(see the example)

Answer 6

the number below the line is always the whole, the number above the line is always the amount of parts of that whole. think about each part of the sum, the biggest lower number being the total amount of parts in the whole. use this rule and you can't go wrong.

Answer 7

for add/sub take LCM of denominator and then add/sub numerator. for multiplication take the product of numerators and denominators. for division take the inverse(flip Nr and Dr) of the divisor and multiply

Answer 8

Go to this link, and take a look. Just practice and memorizing them should not be hard.

http://www.gomath.com/exercises/algebra.php

Answer 9

how to multiply: (a/b)*(c/d) = (ac)/(bd)
how to divide: (a/b)/(c/d) = (a/b)*(d/c)
how to add: (a/b) + (c/d) = (ad+cb)/(bd)
how to subtract: (a/b) - (c/d) = (ad-cb)/(bd)