If you didn't have it you could get a myriad of different answers with the same equation.
There is no operation for a single number and so there can be no order of operation.
you need to because if you follow the order of operations then you will get the question correct. If you don't then you won't. Simple as that
A product is a binary operation: you need 2 (or more) numbers in order for there to be a product.
There are 6 pats in an operation order
The order of operations (BIDMAS/PODMAS) does not change except that you need to remember that there are implied divisions in each fraction.
order of operation
33.8
Operation Chahar order of battle happened in 1937.
Order of battle Swatow Operation happened in 1939.
Operation Brevity order of battle happened in 1941.
They must follow the order of operation because if they don't, they will not get the same answer.
In order to complete such operation, we need a dedicated partitioning program (see Partition Magic, etc.).