Including an introduction to the history of algorithms as well as their more common contemporary uses, this mini-unit features short, easy problems and a few longer ones to help students understand the importance of algorithms in problem-solving.
By 10, by 9, by 5, by 3, and by chunks. This unit contains tricks for multiplication and for checking your work. A playful (and very useful) approach to multiplication. This unit is presented at three levels of varying complexity.