If you mean things like 1/5 + 2/5, you just add the top numbers together, (in this case, 1+2) and because the bottom number is the same number, you just keep it the same (don't add the bottom numbers) so the answer to 1/5 + 2/5 is 3/5.
The usual rules of addition of fractions apply.
The answer to an addition is called the sum. Fractions and other numbers.
In order to add or subtract fractions, they must have the same denominator.
Because that is not how addition of fractions is defined.
You look for a common denominator; convert the fractions to equivalent fractions with the denominator you found; then you do the addition itself.
find a common denominator. Then just add across.
Similar fractions are fractions with the same denominator. In order to add or subtract fractions they need to be similar.
To add fractions, you cannot simply add the numberators and add the denominators. To add fractions, they must first have the same denominator. Once they have the same denominator, you can then simply add the numerators.
Answer: When adding or subtracting fractions with different denominators it is important to change the denominators into the lowest common denominator by using equivalent fractions. Answer: Equivalent fractions are used to: * Simplify fractions. It is sort of inelegant to write the final solution of a problem as 123/246, when you can just as well write it as 1/2. * Add fractions. If two fractions have different denominators, you need to convert them to equivalent fractions that have the same denominator. Only then can you add. * Subtract fractions (same as addition). * Compare fractions, to check which one is larger (same as addition).
If the denominators are not the same, then you have to use equivalent fractions which do have a common denominator . To do this, you need to find the least common multiple (LCM) of the two denominators. To add fractions with unlike denominators, rename the fractions with a common denominator. Then add and simplify.
In subtraction you take away rather than add. Also, addition is commutative, subtraction is not so the order of the numbers does matter for subtraction.
you should use addition in a problem involving fractions if you see key words that mean to add, for example sum increase, altogether, etc