according to the order of operations, which step should be completed first in the following expression: 6 - 3 1^18 divided by 2 . 4 + 8. A division. B multiplication. C exponent. D subtraction.
The correct order of operations is PEMDAS (Parentheses, Exponents, Multiplication and Division from left to right, and Addition and Subtraction from left to right).
In the given expression "6 - 3 * 1^18 / 2 . 4 + 8", we can break it down as follows:
1. Simplify any exponents: There is no exponent in this expression.
2. Perform any multiplication or division from left to right: The expression contains multiplication and division. However, multiplication and division have the same precedence, so we should evaluate them from left to right.
First, we have "3 * 1^18" which can be simplified to 3.
Then, we have "3 / 2", which can be simplified to 1.5.
Therefore, the expression now becomes: "6 - 1.5 . 4 + 8"
3. Finally, perform any addition or subtraction from left to right: The expression contains addition and subtraction. Similarly, addition and subtraction have the same precedence, so we evaluate them from left to right.
The first operation is "6 - 1.5", which equals 4.5.
Then, we have "4.5 . 4", which equals 18.
Finally, we have "18 + 8", which equals 26.
Therefore, the step that should be completed first in the given expression is multiplication or division. Since multiplication and division have the same precedence, the first operation is performed from left to right. Hence, the answer is B.