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.

Seriously, the foundation for all higher mathematics is laid with many of the concepts that we will introduce to you here: negative numbers, absolute value, factors, multiples, decimals, and ...

Fractions Properties of fractions Each fraction close fractionIn fractional distillation, such as that of crude oil, the different parts of the original mixture are called fractions.