This is a repost of an article on BuzzFeed. I found it amusing.
Ahh, Common Core math. Now implemented in 46 states, the controversial standards have had parents crossing their eyes in confusion and frustration since the day it was introduced.
Many parents have taken to social media to share their disdain for the new standards.

The donation check to Melridge Elementary was written out according to the longform Common Core standards — which anyone old enough to work at a bank would have to learn from scratch before cashing the check.
Original article: http://www.buzzfeed.com/morganshanahan/this-dad-wrote-a-check-to-his-kids-school-in-common-core-mat#.hhjxg09M

Would a bank have accepted a check for (2+7)x10+(2×5)?
Hmmm…dollars or cents? So 2+7 = 9 x 10 = 90 + 10 (2×5) = 100. So, $1 or $100? Oh wait…perhaps Euros?
If you wrote the check that way you would still need to write a total on one of the two lines wouldn’t you? Toss in the word dot or decimal after the x10 and see if they understand that?
Thanks