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.

Use visual fraction models to add and subtract fractions with the same denominators.

Learn activities for fourth grade math to prepare for school. Teach your children 4th grade math skills like fractions, multiplication and division.