Question 1

What is a basic calculator?

Accepted Answer

A basic calculator is a four‑function tool for addition, subtraction, multiplication, and division, plus essentials like percent and square root.

Question 2

Does the basic calculator follow order of operations (PEMDAS/BODMAS)?

Accepted Answer

Yes. Expressions with parentheses are evaluated first, then exponents, then multiplication/division, then addition/subtraction.

Question 3

How do I enter percentages correctly?

Accepted Answer

Use the % key to convert a number to its percentage of the current value (e.g., 200 × 10% = 20).

Question 4

Why do I see small rounding differences?

Accepted Answer

Floating‑point math and your chosen precision can produce tiny differences; set the desired decimal places in settings.

Question 5

Can I use keyboard shortcuts?

Accepted Answer

Yes—numbers, + − × * ÷ / . ( ) and Enter work as expected; C clears the last entry and Esc resets all.

Basic Calculator — Free Online Calculator