Question 1

What does PEMDAS stand for?

Accepted Answer

PEMDAS stands for Parentheses, Exponents, Multiplication and Division (left to right), Addition and Subtraction (left to right). Some countries call it BODMAS (Brackets, Orders, Division, Multiplication, Addition, Subtraction) — the rules are identical.

Question 2

Does multiplication come before division?

Accepted Answer

No. Multiplication and division have equal priority and are evaluated left to right. The same applies to addition and subtraction. For example 12 / 3 × 2 = 8, not 2, because you divide first then multiply.

Question 3

What operators does this calculator support?

Accepted Answer

It supports +, -, *, /, ^ (power), parentheses (), decimal numbers, and the unary minus. It rejects invalid characters for safety and reports a clear error if the expression is malformed.

Question 4

How does the step-by-step mode work?

Accepted Answer

After pressing Calculate the tool walks through each reduction: it solves innermost parentheses first, then exponents, then multiplication and division from left to right, and finally addition and subtraction, showing the expression after every step.