*Full disclosure…I only use algorithms at the very end of a unit. I am huge on building number sense, and I believe it is vital to have a firm understanding of the concept before introducing an algorithm. Otherwise, math is just rote memorization and procedure with no connection to number.
Thank you for providing a tutorial on your method. This is really helpful when completing homework the same way work is completed at school. I wish I had these strategies when I learned subtraction as a child! :)
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