How to Divide Fractions Using Keep Change Flip

The Organic Chemistry Tutor

This educational video provides a clear, step-by-step tutorial on how to divide fractions by other fractions using the standard algorithm known as "Keep, Change, Flip." The narrator demonstrates the process through three distinct examples, progressing from simple problems with common denominators to more complex problems requiring simplification. The video emphasizes procedural fluency and efficient calculation strategies. The content focuses on two key mathematical themes: the algorithm for dividing fractions (converting division to multiplication by the reciprocal) and the technique of simplifying fractions. It specifically highlights the method of "cross-canceling" or simplifying before multiplying to avoid working with unnecessarily large numbers, a critical skill for algebra readiness. For the classroom, this video serves as an excellent direct instruction tool or review resource for students learning fraction operations. It creates learning opportunities by explicitly modeling how to set up the problem, how to execute the multiplication, and two different ways to simplify the answer (at the end vs. at the start). Teachers can use the built-in practice problem to check for student understanding in real-time.