TED-Ed

View full lesson: http://ed.ted.com/lessons/how-to-organize-add-and-multiply-matrices-bill-shillito When you're working on a problem with lots of numbers, as in economics, cryptography or 3D graphics, it helps to organize those numbers into a grid, or matrix. Bill Shillito shows us how to work with matrices, with tips for adding, subtracting and multiplying (but not dividing!). Lesson by Bill Shillito, animation by The Leading Sheep Studios.