You need to find the least common multiple of their denominators.
You need common denominators. Then add or subtract the numerators. If the answer is an improper fraction it is common practice to reduce it to a mixed number.
They must have the same denominators.
To add fractions with the same denominators, simply add together the numerators, and cancel down if necessary. For example, 5/8 + 1/8 = 6/8. Cancelling this down to an improper fraction in its simplest form, this is equal to 3/4.
You need to make them similar: that is, making sure they have the same denominator. This would be a common multiple of the denominators of the fractions: though not necessarily the least common denominator.
You need to find the least common multiple of their denominators.
You need common denominators. Then add or subtract the numerators. If the answer is an improper fraction it is common practice to reduce it to a mixed number.
They must have the same denominators.
You make it into a improper fraction, then make a common denominator and remember to do what you did to the bottom to the top then solve
By finding the lowest common multiple of the denominators
To add fractions with the same denominators, simply add together the numerators, and cancel down if necessary. For example, 5/8 + 1/8 = 6/8. Cancelling this down to an improper fraction in its simplest form, this is equal to 3/4.
because they are the same number
You need to make them similar: that is, making sure they have the same denominator. This would be a common multiple of the denominators of the fractions: though not necessarily the least common denominator.
The fastest and surest way to do that is to have a calculator that has a fraction button. (a b/c)
In order to add fractions, they must have the same denominators. If the fractions you wish to add do not already have the same denominators, they can be made to do so by finding the right number by which to multiply both the numerator and the denominator of each fraction. To find this number, multiply all the distinct denominators together, then multiply both the numerator and denominator of each fraction by a number found by the dividing the product of the distinct denominators by the denominator of the particular fraction concerned. All the fractions will then have the same denominator. Add the numerators of such fractions together to find the numerator of the sum; its denominator will be the one common to all the fractions.
By only adding the two numeraters.
You need at least two denominators to find something in common between them.