In this paper, I shared that my 77 preservice teachers initially had a difficult time understanding the mathematical basis for the 2-digit multiplication algorithm, by exploring three different algorithms (one familiar, and two unfamiliar ones).
In this paper, I shared that my 77 preservice teachers initially had a difficult timeunderstanding the mathematical basis for the 2-digit multiplication algorithm, byexploring three different algorithms (one familiar, and two unfamiliar ones).