According to NBC Washington, this is one of the ridiculous ways Common Core teaches kids problem solving and critical thinking… with simple beyond reason math problems.
I found this image on Facebook and shared it and even asked my stepfather to take a look at it. An aerospace engineer (a career involving a heavy amount of calculus) could not figure out what was going on here. If you’re making math so hard that someone who studied his ass off in calculus classes can’t understand it, you’re making it too hard for kids. Burn Common Core to the fucking ground.
I can’t even begin to understand why this new fangled way is necessary. Like…I’m so confused right now looking at this shit. Bish whet?
Fuck the American public education system. This shit is why out children don’t tank top 10 globally. This is why our children can’t get jobs.
WHERE DID THE 5 COME FROM
The concept of this isn’t as hard as you think. Honestly I believe everyone does this without realizing. In many cases adding increments is much easier than subtracting. Instead of subracting the subtrahend (12) from the minuend (32), why not add to the subtrahend to get the difference?
When I’m at work, I don’t calculate the change by subtracting $17.32 from $20.00. I add 8 cents: $17.40, add 60 cents: $18.00, then I add $2.00. Their change will be $2.68.
Consider time also. You’re at school and it is 10:14 am and you get out at 2:00 pm. In your head you add 6 minutes to 10:14, then 40 minutes, and then finally 3 hours.
These steps can all be condensed, but a lot of the time the “new” way is much easier than the “old fashioned” way.
While our system is deeply problematic, all of the posts I’ve seen circulating about common core are usually nothing more than a photo of a lesson without context and without that it will inevitably be more difficult to understand. There is no way that common core is eliminating standard subtraction as it is completely necessary but for some people a technique like this is incredibly useful, especially in everyday life. One thing we need more in our education is the support of alternative teaching methods as it has been proven time and time again that each individual learns in vastly different ways.