according to the order of operations which step should be completed first in the following expression 6 - 3 x 1^18 / 2 x 4 + 8
According to the order of operations, parentheses should be completed first, followed by any exponents. Once parentheses and exponents are dealt with, multiplication and division should be completed from left to right. Finally, addition and subtraction should also be done from left to right.
Using these rules, the first step that should be completed in the given expression is the exponent operation, which is 1^18.