The world is lost: no one can agree on the answer to this simple calculation.

 The calculation in question

3 × 3 − 3 ÷ 3 + 3

The essential rule to know

The secret here is the order of operations (the famous priority):

Multiplication and division

Then addition and subtraction

Always from left to right when they are at the same level

Step by step

So we start with multiplication and division:

3 × 3 = 9

3 ÷ 3 = 1

The expression becomes:

9 − 1 + 3

Next, we calculate from left to right:

9 − 1 = 8

8 + 3 = 11

Final result: 11

Why so many errors?

Many people make this classic mistake:

simply calculating from left to right without respecting the order of operations.

For example:

3 × 3 = 9

9 − 3 = 6

6 ÷ 3 = 2

2 + 3 = 5 (incorrect)

This quick reflex is precisely the trap!

What this teaches us

This type of calculation becomes widespread for a simple reason:

it seems easy… so we don't check.

But in math, as in life, going too fast often leads to error.

Take your time: that's often where the correct answer lies.

Respecting the rules guarantees a correct calculation.