What’s the Point of Expanded Form?

OK, I’m going back in time to tell you something totally ridiculous that I actually said to another teacher. It was because of my inexperience and my inability to understand math at a deep level during my second year of teaching.  I was frustrated that my students weren’t understanding what expanded form (that 145 is…
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from Beyond Traditional Math
https://beyondtraditionalmath.wordpress.com/2017/08/10/whats-the-point-of-expanded-form/

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