Quote:
1 dollar / 1 dollar = (1 * dollar) / (1 * dollar) = (1 / 1) * (dollar / dollar) = 1 * 1 = 1


1 what?

1 dollar?

your problem is that you left out the unit that you needed
to find in the equation which is the cost unit.
by writing the equation the correct way as below you can
see that the cost unit is important and is the reason why
the equation was used.


Quote:
cost = 1 dollar / 1 dollar = (1 * dollar) / (1 * dollar) = (1 / 1) * (dollar / dollar) = 1 * 1 = 1


but you left out the cost unit in your answer causing your
answer to be incorrect.

Don't forget to include the units in the calculation, that is elementary.

also don't forget to include the units in the answer you
provide as some may not understand what the 1 is supposed
to represent when determining the cost of something.

that's like going to buy a new car and the man says he will
sell you a new car for 20 , so you pull out a 20 dollar bill
and say sold...


suppose I go back in all the post you have made and used
math , would they all be algebra , or can you divide without
using algebra?

Quote:
cost = 1 dollar / 1 dollar = 1 dollar


what if I would have written it this way

Quote:
cost = 1 dollar / 1 = 1 dollar


then you could say 1 what , it could be a penny you know
that's why its always best to use units when possible
to avoid confusion.


cost as in how much something cost

cost = 1 dollar --- RIGHT ANSWER

not

cost = 1 ----------- WRONG ANSWER


3/4 inch of dust build up on the moon in 4.527 billion years,LOL and QM is fantasy science.