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.

Each fraction has the same denominator. Use the numerators to order the fractions. The smaller the numerator, the smaller the fraction. The numerators are all the same. Use the denominators to order ...

A fraction describes how many parts of an object there are. You can use fractions to split a whole number into parts, such as halves or quarters. Fractions can be written in words or as a figure. In ...