Mar 24, 2021 · The 'ambiguity' here comes from the fact that we use parenthesis as a multiplication operator as well. We can agree that $2(1+2) = 2 \times (1+2)$

Sep 14, 2011 · As to multiplication, both addition and multiplication are just some operations that map two elements to one element. I think you can define any operations on a set to be addition or multiplication. As long as the operations respect the laws you get from arithmetic because of the "Principle of Permanence".

May 20, 2013 · Many years ago, I noticed that $987654321/123456789 = 8.0000000729\\ldots$. I sent it in to Martin Gardner at Scientific American and he published it in his column!!! My life has gone downhill si...

Oct 20, 2012 · arithmetic; Share. Cite. Follow edited Oct 20, 2012 at 10:36. Américo Tavares. 39.1k 13 13 gold badges ...

Jan 28, 2021 · arithmetic; Share. Cite. Follow edited Jan 28, 2021 at 14:33. Dietrich Burde. 138k 8 8 gold badges 96 96 ...

Feb 28, 2022 · First, let's do 3 times 0.5, which we'll treat as 0.5 + 0.5 + 0.5. But instead of thinking of it happening all at once, imagine we take 3 seconds, and in the first second we move from 0 to 0.5, in the second second we move from 0.5 to 1.0, and in the third second we move from 1.0 to 1.5, and then we're finished and see our answer is 1.5.

$\cong$ is used to show a congruency between two mathematical expressions, which could be geometrical, topological, and when using modulo arithmetic you can get different numbers that are congruent, e.g., $5 \text{ mod } 3 \cong 11 \text{ mod } 3$ (although this is also written as $\equiv$). In LaTeX it is coded as \cong.

By no-changer I refer, of course, to the unit element. That this can be added/multiplied to anything without resulting in a change should be accepted. I am unsure wether this approach helps understanding the hierarchy of arithmetic operators or wether you need the hierarchy for understanding the approach.

arithmetic; infinity; Share. Cite. Follow edited Mar 7, 2014 at 9:48. Willie Wong. 74.7k 13 13 gold badges ...

Dec 9, 2010 · I am finding with some formulas for my web application. I need a formula that counts the number of values between two number, e.g. there are four numbers (3,4,5,6) between 2 and 7