To do mental calculations of this size, one needs to be quick at multiplying 2-digit and 3-digit numbers by 1-digit numbers, generating the answer from left to right. More details and examples are given in Secrets of Mental Math [1], which Martin encouraged me to write. As I prepared a DVD version of this book [2] recently, I learned some new methods for cubing and cube-rooting. Although much of that material did not end up in the DVD, I thought it would be of interest to readers of this Journal.