Connecting Addition and Subtraction with Fact Families

Khan Academy

This concise video provides a clear visual demonstration of the inverse relationship between addition and subtraction, often referred to as "fact families." Using colored balls as manipulatives, the narrator illustrates that if two parts make a whole (2 green + 3 purple = 5 total), then subtracting one part from the whole reveals the remaining part. The video systematically moves from an addition problem to two related subtraction problems to solidify this connection. Key themes explored include basic counting, the concept of "all together," taking away/subtraction, and the pattern recognition required to understand inverse operations. The visual representation of crossing out items helps students transition from concrete counting to abstract symbolic math notation. For educators, this video serves as an excellent introduction or review of fact families for early elementary students. It provides a visual bridge for students who struggle to see how subtraction problems relate back to addition facts they may already know. The digital whiteboard format allows teachers to pause and have students predict the outcome before the narrator reveals the answer, making it an interactive tool for whole-class instruction.