When addition, subtraction, multiplication, division, and parentheses are all mixed together, you can't just calculate in any order. Click the buttons to check which part should be calculated first, one step at a time.
Order of operations: ① Inside parentheses → ② Multiplication & division (left to right) → ③ Addition & subtraction (left to right).
If you don't follow this order, the same expression can give a completely different answer. For example, 2 + 3 × 4 gives 20 if you add from left to right, but gives 14 if you multiply first — everyone has to follow the same agreed-upon order so they all get the same answer.
This same rule is followed by calculators and programming languages too. Click through the buttons and see which part gets calculated first right now, and why. Remember: whenever there are parentheses, they always come first.