1:46 AM
Hi! It's said that when determining the number of significant figures in addition and subtraction of numbers, the answer is rounded to the least number of decimal places in the original numbers added.
But how to determine the significant figures in something like 380000+4.25?

1 hour later…
3:06 AM
@BuddhiniAngelika in general you use the same amount of sig. digits as the number with the lowest amount. In your example you have 2 sig. digits in 380000 and 3 in 4.25 so your answer will be 380000

6 hours later…
9:29 AM
0

I know that their are some similar questions like the one above but I have a genuine concern. For example this question A puzzling simple question on thermodynamics or another I had deleted. Apparently this community does not like being asked questions on genuine problems and questions which some...

5 hours later…
2:40 PM
@ACuriousMind if you think of signs as (-1)^n then those errors are also off-by-one

2:54 PM
hmm, you're on to something there

3 hours later…
5:35 PM
I wonder what's the oldest reference on the dimensionality of space
Who was the first person to articulate that space has three dimensions
As far as I know the synthetic geometry equivalent of 3 dimensions is saying that there exists 4 points that are not coplanar
I guess it's sort of implicit in Euclid's definitions :
"A solid is that which has length, breadth, and thickness."