Math problem (1 or 100) (obelus vs solidus)

Factual Questions
21

Correct, it is not ambiguity at all, wrong it does matter what symbol you use. It does matter if you learned math from a joke of a textbook company like wolfram, or if you learned math from a legitimate company.

Don’t you think making

    4

2×______×(5+5) could be easier to write?
2

What about

2×4

2×(5+5)

An obelus was created for the first to write that equation in the in-line equation form and made it into 2×4÷2×(5+5) for about 100 years the second equation still had to be written with a fraction bar and used alot of paper until the solidus was created. Making it 2×4/2×(5+5)

In the early 1900’s a printing press thought the one symbol looked better than the other symbol, and the high-school dropouts that printed the book misprinted there books.
There is actually 13 steps to solve equations, and not just the 4 you learned by the 5th or 6th grade.

22

I’m afraid that your posts are mostly unreadable as written-- You might try using the math markup feature here. It’s based on TeX, and is tagged by putting a dollar sign at the start and end of the equation
\frac{20}{2}(5+5) = ?

Like that.

23

all of these equations are set up to see if people know their math properties or not. there is no ambiguity in an equation this simple. You would have to have a variable in the equation where the variable is set to =? that is the only way to make it ambiguous. the three that keep showing up are…

8 / 2(2+2)=

6 / 2(1+2)=

20 / 2 (5+5) =

They are all solved the same way and come to an answer of 1.
an obelus, solidus and vinculum (fraction bar) they all ask the same thing “divided by”. What these equations are set to do is see if you know just the standard mathematical properties like PEMDAS, BODMAS or if you have some more advanced properties in your tool bag like rule of juxtaposition or distributive property. Also wants to see how many people check their work. You check you work by rearranging into a more workable equation that does not cause a chance of error in the order of operations. best way to turn a linear obelus or solidus equation into a more understandable equation is to turn the equation into a fraction with the vinculum. This is a bad keyboard to do it so please understand…

20
/////////// thats the best I can do with this keyboard
2(5+5)

24

Welcome.

20 \over{2(5+5)}

One of the nice things about this board is that it has the MathJax extension. Makes things vastly nicer.

25

Or, alternately, if you use a different set of rules, \frac{20}{2}(5+5).

Both of those rulesets are standard, and commonly taught and used. Some calculators will use one, some the other. Yes, it really is ambiguous.