What is PEMDAS?

PEMDAS is a rule in mathematics that indicates the order in which operations should be performed, defining the precedence of each operation. PEMDAS is an acronym created from the first letter of each operation in English, following this order:

• P (Parentheses): Parentheses
• E (Exponents): Exponents
• MD (Multiplication and Division): Multiplication and Division (from left to right)
• AS (Addition and Subtraction): Addition and Subtraction (from left to right)

Calculation Order According to PEMDAS

According to the PEMDAS rule, when calculating an expression, you first evaluate the content inside the parentheses, then the exponents, followed by multiplication and division, and finally addition and subtraction in order. Multiplication and division, as well as addition and subtraction, have the same level of precedence and are calculated from left to right.

Example Expression:

1. Parentheses: Calculate the operations inside the parentheses first. $$5 + 4 = 9$$
2. Exponents: Calculate the exponents. $$3^2 = 9$$
3. Multiplication and Division: Perform multiplication and division from left to right. $$6 × 9 ÷ 9 = 54 ÷ 9 = 6$$
4. Addition and Subtraction: Perform addition and subtraction from left to right. $$3 + 6 - 7 = 2$$