theabsurdmudskipperstentialist:

rebelghostalliance:

letstakearunthroughspace:

letskeepthisasecret-babe:

danthemedicman:

nikkisshadetree:

randomqueerbrown:

jelly-bean-machine:

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.

yes!!

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?

what the fuck is this shit

where are they getting 3, 5, 10 and 2 from?

i’m so confused.

What the ever loving fuck is this ? A part of me is glad i didn’t decide to become a math teacher. Id get fired for teaching it the old fashioned way.

I hate this crap.

jimmykudos thoughts?

Ok so as far as I can tell this method is completely ridiculous and trying to get kids to understand this would be like teaching a dog how to use a jetpack. BUT I think I’ve puzzled it out.

So the first step is to add the first digit of the number being subtracted from to the number being subtracted from it. So if the problem was 75 - 37 you would add 37 + 7 (order is important. You have to have the subtractor first or the last step doesn’t work properly) and get 44. Then you add up from that until you’re at the next tens place.

So:

37 + 7 = 44

44 + 6 = 50

and then you add up to the next tens place until you’re at the tens place of the original number

37 + 7 = 44

44 + 6 = 50

50 + 10 = 60

60 + 10 = 70

Now at this point, you add up to the number being subtracted from.

37 + 7 = 44

44 + 6 = 50

50 + 10 = 60

60 + 10 = 70

70 + 5 = 75

Then you add up all of the numbers in the second line, and get the answer.

37 + **7** = 44

44 + **6** = 50

50 + **10** = 60

60 + **10** = 70

70 + **5 **= 75

7 + 6 + 10 + 10 + 5 = 38

Which is the correct answer to 75 - 37.

This is the most inefficient and obtuse way I’ve ever seen mathematics written.

But there’s also a slightly quicker, but equally stupid, way of doing it. To use 75-37 again, what you do is just add every number to the nearest multiple of 10, then add to the number that you’re subtracting from when you get to the closest multiple of 10, and then add those numbers to get the difference.

37+3=40

40+10=50

50+10=60

60+10=70

70+5=75

3+10+10+10+5=38

75-37=38

The only reason I can think of for why they would teach it this way is because it eliminates having to carry numbers over, but this isn’t any more intuitive.