These multiplication problems are taken from the book, Making Number Talks Matter. Chapter five in the book explains and gives examples of four strategies to use when doing mental math to solve multiplication problems. This is an amazing book that explains many different strategies for mentally breaking down and solving problems involving all operations involving whole numbers, decimals, and fractions. I have been looking for a place that has the strategies listed with the example problems for each strategy. I have not found it so I typed it up myself. Enjoy:)