You memorize the rules that are considered standard.
yes
the order of operations
If you change the order of operations, you will get a different result. The person who wrote the expression had a specific order of operations in mind (using generally-accepted rules), so arbitrarily using some other order of operations is, quite simply, wrong.
Order of Operations
We have to use the order of operations so everyone solves a problem the same.
how do you use order of operations
No professions use order of operations. It is just a method of solving an equation.
Because if you perform the operations in a different order your answer will be wrong.
You use order of operations in equations that have more than one type of operation going on (for example, an equation with parenthesis, addition, and multiplication). You would use order of operations in equations like that so you know which operation to do first.
You don't.
Use brackets or parentheses.
We use the order of operations as a method of solving mathematical equations containing three or more operation symbols. The order of operations help us to solve certain segments of the equation before adding it all together to find out what the final answer is.
Yes. Basically, you get different results if you use a different order.
It is convenient for different people to agree on the standard order of operations. This saves complicated explanations.
solve the top and bottom first
you have to use "order of operations"