Partial Sums Addition Algorithm (Whole Numbers)

This foundations of math video explains the partial sums addition algorithm for whole numbers. This addition method can be done from right to left or left to right. The method is completed working one place value at a time. It also assists with building mental math skills. We show both how to use the method going left to right, and also right to left. We work examples of adding 3-digit and 4-digit numbers in this video.