Your bakers might not realize that they need to know how to add with unlike denominators in order to figure out how much milk they need for a recipe. In order to make brownies and cookies, this lesson teaches how to find a common denominator using two methods and goes step by step to create fractions to add and subtract. The quickest way to find the like number is to multiply the denominators, while sometimes your learners may see a pattern and use the LCM. They can use the Test Yourself link to practice these skills with easy and more challenging questions.