In the order of operations, what operation is completed first?

PEMDAS or order of operations is a set sequence to perform operations in an arithmetic expression. 

Answer: In the order of operations, we simplify parentheses first.

PEMDAS is an order of operations used in mathematics to deal easily with complex calculations.

Explanation:

PEMDAS is an acronym used to mention the order of operations to be followed while solving expressions having multiple operations. PEMDAS stands for P- Parentheses, E- Exponents, M- Multiplication, D- Division, A- Addition and S- Subtraction. PEMDAS is an order of operations used in mathematics to deal easily with complex calculations. It states that we start solving any arithmetic expression by solving the terms written in parentheses or brackets.

Therefore, in the order of operations, we simplify parentheses first.