Teaching how to round numbers

A topic that sometimes comes up on standardized tests is that of rounding. This blog post below not only gives advice about how to teach it well but also some background on the concept. How do you (as an adult) use rounding in your everyday life?

 

http://mathcoachscorner.blogspot.com/2012/08/rounding-on-open-number-line.html

In the Montessori classroom, we have many materials that can aid in conceptualizing this.

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