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[–] SpaceLizard ago  (edited ago)

You asked for evidence that hey are not teaching rounding incorrectly(even though it was your claim they did not lol). Here you go. http://www.commoncoresheets.com/Math/Rounding/Hundreds%20%28With%20Numberline%29/English/1.pdf

http://www.commoncoresheets.com/Math/Rounding/Tens%20%28With%20Numberline%29/English/1.pdf

I know it's not a famous unmarked fake image spread among bloggers with an agenda, but hopefully it will work for you.

Even more evidence

https://hcpss.instructure.com/courses/97/pages/3-dot-nbt-dot-1-about-the-math-learning-targets-and-rigor

and more with a cute voice

https://www.youtube.com/watch?v=bOsxu8m24Ic

and more lol

http://www.schools.utah.gov/CURR/mathelem/Core/Base-Ten/Standard1G3.aspx

It's almost like there is a mountain of examples for why your an idiot for believing that image if you just search for 3nbt1. Which refers to the common core standard http://www.corestandards.org/Math/Content/3/NBT/#CCSS.Math.Content.3.NBT.A.3.