How to give your students a behind-the-scenes look at column addition and subtraction -- interactive lessons to help take the mystery out of exchanging
Regrouping and exchanging in two-digit addition and subtraction is one of those math procedures that is often used without understanding the underlying concepts. Here, we would like to share with you some ideas we use to approach this challenging topic...
Place Value Disks provide visual representation and help students make the next step in developing abstract thinking. Try them with Happy Numbers math app!
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