So simple math problems are blowing people’s minds now?
Always has been.
Just wait for the annual “PEDMAS vs PEMDAS” discussion flame-war on any major social media platform.
It can matter if you don’t have enough significant figures, so I tend to do division last to preserve as much precision as I can. In theory it shouldn’t matter, but it can matter in practice.
If it bothers your OCD, think of it more as (7x3)+(10x3)=17x3=51
Or the way I do it:
- 3 * 20 = 60
- 60 - 51 = 9
- 20 - (9 / 3) = 17
So the factors are 17 and 3. I know 3 is a factor because 5+1=6, which is divisible by 3, so I just use a convenient multiple of 3 that’s pretty close to the actual number to get the divisor.
I have young kids and they keep asking me to do crazy math problems while driving, so that’s generally the trick I use.
Dude/ Dudette that’s worse. 7x3=21, 10x3=30, 21+30=492 51
That does less insane to the membrane
I see them as the same except that your way illustrates what his parentheses are doing.
The way I see it the parentheses are good, it the 17x3 that hurts my brain.
It’s already broken down, then gets more complicated by the 17x3. In my mind I now need to separate 17 into 10 and 7 then multiply them each by 3 and add them together, which is where we started in the first place.
Brains are different, that’s how mine goes though.
By a similar pattern, 91 is not a prime number. Really got me once.
C’mon Chloe! This is 3rd grade math.
4:20 pm
