Unlike fractions are fractions that have different denominators. For example, 1/4 and 3/8 are unlike fractions because they have different denominators.
Making the denominators the same allows us to combine or compare the same-sized parts. It ensures that we are working with equivalent fractions, which is necessary for accurate addition or subtraction.
Visual models, such as fraction bars or circles, can help us visualize the parts being added or subtracted. They provide a concrete representation of the mathematical concept, making it easier to understand and solve problems.