Everyday Math: Partial Sums Algorithm

We are learning the Everyday Math algorithm for addition called the Partial-Sums Method. Most fourth graders have mastered an algorithm of their choice for addition. If they are proficient in using that algorithm then they should use it. They are, however, expected to know the partial-sums algorithm for addition. The method helps them develop their understanding of place value and addition. In the partial-sums method, addition is performed from left to right, column by column. The sum for each column is recorded on a seperate line. The partial sums are added at either each step or at the end.

Here is a video that explains how to do this method: Addition Partial-Sums. The Everyday Math company has put the algorithims used in its program online. The animated directions take you through a problem step-by-step so students can refresh their memories or parents can learn the new algorithims. These are great refreshers, models, and argument breakers!

Here is the link to take you to the algorithms. Just click on the button for "Algorithims in Everyday Math", then click on grade 4. select an operation, an algorithim, and then an animation. There are six examples on this page for varying degrees of difficulty. The link above is one you want to bookmark for the many examples of how to do the algorithms in Everyday Math.