I show how to do the standard multiplication algorithm, comparing it to the partial products algorithm (which I'm calling "the easy way" in the video). We do 1 digit by 2 digit, then 1 digit by 3 digits, and also by 4 digits. In several of our practice problems we also estimate the final product before multiplying.
This lesson is meant for 4th grade math. Check out also my other videos for 4th grade at http://www.mathmammoth.com/videos/grade_4/math_videos_4th_grade.php
Tagged under: 4th grade,math,multiplication,standard algorithm,estimate,product,1 digit 2 digit,1 digit 3 digits
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