In adding and subtracting fractions with unlike denominators, you have to get a least common denominator which is exactly like the least common multiple it just so happens to be in the denominator.

Find out how to add and subtract fractions with matching and different denominators in this Year 6 article from BBC Bitesize.

Students will be able to practice comparing fractions with like denominators.

Learn how to add and subtract fractions with this BBC BItesize Scotland Mathematics guide for Third Level Curriculum for Excellence.