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Common Core 32 12? please help my brain! 
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#1
Mar414, 11:54 PM

P: 2

I am trying very desperately to figure out this specific problem I don't need examples of other problems i need this very very specific problem before i loose my freaking mind. Please someone explain this and show me how it works I am extremely desperate. I am told this is some sort of key, I do not know this is not my math problems or work sheet, just information I was unfortunate enough to stumble on a meme. Absolutely no one can give me a straight answer, I have even asked a math teacher and he had no idea what this was.



#2
Mar514, 01:15 AM

HW Helper
P: 2,264

The first one is 3212=20.
The second is 248*38=9386. The methods used are subtraction by addition and lattice multiplication. The lattice multiplication is sensible, while correct I do not see the reasoning behind the subtraction, that is not how I would do it. 


#3
Mar514, 04:03 PM

P: 13

the subtraction 'method' looks like hard work to me! Starting with 12, if you add, in succession, the numbers 3,5,10 and 2, you reach a total of 32. Hence the answer to 3212 is equal to the sum of those numbers  20. The choice of numbers to add seems somewhat arbitrary, save for the fact that the intermediate totals are round numbers  well, sort of. I'll stick with the traditional method!



#4
Mar514, 04:16 PM

P: 2

Common Core 32 12? please help my brain!
Thank you guys, I am digging around looking for every spec of information on this, I cant believe this is being taught in schools now.



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