Ironically the same people who complain that others no longer know how to count back change, are the same people who complain about problems like this. This is the exact concept behind counting back change. ----------------------------------------------------------------------------------- I know. That’s still ridiculous. Well, consider this: Suppose you buy coffee and it costs $4.30 but all you have is a $20 bill. How much change should the barista give you back? (Assume for a second the register is broken.) You sure as hell aren’t going to get out a sheet of paper and do this: i.imgur/OKh4BeF.jpg Instead, you’d just figure it out this way: It’d take 70 cents to get to $5… and another $15 to get to $20… so you should get back $15.70. patheos/blogs/friendlyatheist/2014/03/07/about-that-common-core-math-problem-making-the-rounds-on-facebook/
Posted on: Sat, 08 Mar 2014 02:27:28 +0000
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