Math puzzle

[irisblue]

Link to tweet

I do 7+8=15. 15+60=75

The thread with other answers interesting

[genxlib]

1. I do

30+50-5

[Piasladic]

2. same answer- different way

20 +40 = 60
7+8 =15
60+15 = 75

[zipplewrath]

3. Orders of magnitude

20 + 40 = 60

8 + 7 = 15

60 + 15 = 75

[NurseJackie]

18. Same.

[zipplewrath]

28. Then I check

Strangely, probably because of my former profession, I'd then "check" my answer by doing:

30 + 50 = 80

Recognizing that my answer should be less than 80.

[brokephibroke]

4. I do

75-2+2

[Laelth]

5. I do this:

7+8=15, Carry the one. 1+2+4=7, Tens digit=7, Ones digit=5. Thus: 75.



-Laelth

[Cornus]

7. That's what I do too,

which is mentally adding it the way you would if it were on paper, but a couple of the other processes make more sense.

[Laelth]

11. For me, it depends upon my familiarity with the numbers in question.

I also think I have different processes for different numbers, especially when the sum of the ones digits is less than 10.

For example, if asked what the sum of 31 and 53 was, my mind, unconsciously, would go 30+50=80, 1+3 is 4. Thus, 84.

-Laelth

[Shrike47]

10. I do the same, mentally arranging the numbers as though there were paper and a pencil.

[sdfernando]

17. This is the way I learned it in school.

And to the OP....”tryna”....really?

[irisblue]

20. Since I did not create the original tweet, I suggest you discuss your grammar concerns with him

You can see his twitter address right?

[sdfernando]

21. Sorry....didn't notice it....I don't twitter so I often miss that. /nt

[consider_this]

26. same

[JustFiveMoreMinutes]

27. Me too!

[Upthevibe]

30. Laelth....

That's what I do too...exactly....

[petronius]

6. I do "20 + 40 + 7 + 8 equals 95"

And then I get my calculator...


(Everything before the "equals" is true. Can't put "=" in a DU subject?)

[happybird]

8. It's weird writing it out because it happens fast in my head, lol

8+7=15 (So 5, after moving the 1 over)
2+4+1=7

75

[surrealAmerican]

9. This:

48 is two less than fifty, so take those two from the 27, giving you 25 + 50 = 75

[dweller]

15. same here

25+50

✌🏼

[KPN]

12. [27+3 (30)] + [48-3(45)] 75

[Claire Oh Nette]

13. round up and down...

27, so 30 + 48, so 45. so 75?

Then I ask my math teacher hubband, just to be sure....

[soothsayer]

14. Can we start with the elephant pictures please, doctor?

Link to tweet

?s=21


Donald J. Drumpf
@RealDonalDrumpf
Can we start with the elephant pictures please, doctor?

[brush]

16. I make the 27, 30 in my head because adding 30 to 48 is easy...

and equals 78, then subtract the 3 I added earlier which equals 75.

[NurseJackie]

19. Tryna? I despise that...

... and "addy" and "innit" and "prolly".

[irisblue]

22. English, both verbal and written is evolving. You know the saying

Last edited Sat Sep 5, 2020, 02:20 PM - Edit history (1)

Source--http://www.paulingraham.com/loose-grammar.html

snip-"This is a common paraphrasing of something writer James Nicoll composed in a discussion group many moons ago (source long gone):

The problem with defending the purity of the English language is that English is about as pure as a cribhouse whore. We don’t just borrow words; on occasion, English has pursued other languages down alleyways to beat them unconscious and rifle their pockets for new vocabulary."


Oddly enough, todays WeekendEdition had a segment on how punctuation in text messages are changing. Apparently age related

https://www.npr.org/2020/09/05/909969004/before-texting-your-kid-make-sure-to-double-check-your-punctuation

transcript available at source

[NurseJackie]

23. I'm just old (and old-fashioned). I see it as laziness.

Apparently age related

I'm just old (and old-fashioned). I see it as laziness. But, I do type "LOL" a lot.

[irisblue]

24. In listening to that clip as I made food, the period non usage suprised me.

From transcript..."well, periods are how you end a sentence.

But in text messaging — at least for younger adults — periods do more than just end a sentence: they also can set a tone.

Gretchen McCulloch, a linguist and author of the book Because Internet: Understanding the New Rules of Language, told NPR's All Things Considered last year that when it comes to text messaging, the period has lost its original purpose because rather needing a symbol to indicate the end of a sentence, you can simply hit send on your message.

That doesn't mean the period has lost all purpose in text messaging. Now it can be used to indicate seriousness or a sense of finality.


For me, I will fight for the Oxford Comma and Semicolon usage. Period.

[Midnightwalk]

25. 2+4 sixty 5 oh a carry 75

I do arithmetic in head a lot and “cheat” a lot. I’m not going backwards/slow for two digit numbers.

[The Velveteen Ocelot]

29. 30+50 - 5 (3 + 2).

[JustABozoOnThisBus]

31. If I subtract 2 from 27 and add it to 48,

then the question is: What's 25 + 50? Well, that's easy.

[Totally Tunsie]

32. 48+20 is 68, plus 7 equals 75

[discntnt_irny_srcsm]

33. I just think to myself...

..."the calc is pinned to task bar, why am I doing this?"

[irisblue]

34. Hehehehehe.

[Fla Dem]

35. 27+48 hmmm 7+8 equals 15, use the 5 carry the 1, so 2+4+1 equals 7. Total 75. Or

Or 27+50=77-2=75.

Is this a trick question?

What the heck? my = signs keep disappearing in the header.

[irisblue]

36. Not for most of DU, mayhaps it is for trumpers