Adding bigger sums using open numbers
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Summing up a sequence of two digit numbers is an important secondary skill that becomes crucial when we move to multiplication. With open numbers, we are able to introduce a novel way of doing this, utilizing a big end approach to numbers. There are a number of advantages to this approach. We also connect with the idea of approximating a sum, by finding a range in which the required answer sits. My research papers can be found at my Research Gate page, at https://www.researchgate.net/profile/... I also have a blog at http://njwildberger.com/, where I will discuss lots of foundational issues, along with other things, and you can check out my website at http://wildegg.com where screenshot pdfs of many of the lecture series are available. If you would like to support all these initiatives, please consider to become a Patron of this Channel at https://www.patreon.com/njwildberger?