Unsure if this is a parody post or not.

'taght'

That aside. BODMAS is the rule that has been in place for a number of years and purely explains how to solve an equation based on how it is written. For 500 + 450 / 5 that means you would do the division first so 450 / 5 which gives 90 then the addition, which gives 500 + 90, hence 590.

Your bakery analogy doesn't work because how that would work as an equation would be written differently.

(500 + 450)/5