I actually prefer this method. And yes, I scored nicely on the various aptitude tests through GRE and GMAT.
This reminds me of the “new math” from the sixties. The new math did much harm to so many students.
I tend to do math problems in my head. I had this one solved by the time I read the words “by breaking.” It went like this: 7 plus 7 is 14, minus one is 13, carry the 1, 2 plus 1 plus 1 is 4, the answer is 43.
On columns of numbers, I’ll add up the digits that add to 10 or 20, then add up whatever is left over. I have never broken numbers down to get numbers that will add to 10, that seems like unnecessary complication.
I hate math and totally suck at it. As such, I have my own quirky methods when it comes to numbers. In this example, I would add 20 to 26, then minus 3, which equals 43. Voila, and in 2 simple steps I’m done. CC requires unnecessary and confusing steps that would boggle most minds.
casue that's SO much easier than saying 26+10=36 and 36+7=43... now i get itOne might point out that “breaking” 17 into 10 and 7, “makes a ten”, which can be added to 26 to get 36, which is 30 + 6. That still leaves us with 7+6, but is 7+6 = 13 really any harder than “thinking” 13+4 = 17 ? One has to subtract 4 from 17 leaving 13 ... and where were we?
I agree this is very poor pedagogy.
SHEESH...how convoluted....I added 7+6, got 13, took the 1 and added it to 2+1, put them together and got 43. 3 steps in my head.
Donno. I would just add 26 + 10 = 36. Then add the remaining 7. Gets you to 43.
Would have been easier to borrow 3 from the first operand adding it to the second giving 23 + 20.
Common core is pathetic.
WTF???
N owonder I can’t get the right change anymore...yeah, even from a digital cash register....
I have to wonder what that page would look like if they were asking for two 7 digit numbers to be added. Any idea?