Operations with Fractions
Adding and Subtracting Fractions
When adding and subtracting fractions , the first thing to check is if the denominators are the same.
Adding and Subtracting Fractions with Like Denominators
If the denominators are the same, then it's pretty easy: just add or subtract the numerators, and write the result over the same denominator.
Adding and Subtracting Fractions with Unlike Denominators
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.
Multiplying and Dividing with Fractions
Multiplying a Fraction by a Fraction
To multiply two fractions, just multiply the numerators to get the numerator of the product, and multiply the denominators to get the denominator of the product.
Multiplying a Fraction by an Integer
To multiply a fraction by a whole number, remember that any integer can be written as the fraction .
Dividing by a Fraction
Divide by .