Be warned: this little calculation looks completely innocent. A few numbers, a handful of operations, nothing too difficult on the surface. And yet, it trips up almost everyone, from high school students to adults who thought they were pretty comfortable with numbers. The secret? It’s not a question of math ability. It’s a question of method. And the good news is: this method can be learned in just two minutes.
The calculation that makes you lose your mind (and why)
Here’s the phrase that’s causing a stir online right now:
2 + 2 + 2 + 2 + 2 ÷ 2 + 2
The natural reaction for most of us? To add everything up from left to right, as if reading a sentence. The result: we arrive at 7, or 6, or other numbers… but rarely the right one. And yet, the rule that solves this has existed since middle school. We’ve just forgotten it a little along the way.
The golden rule that school taught us (and that we’ve forgotten)
In mathematics, not all operations are equal. There is a very precise hierarchy to follow, in this order:
1. Parentheses come first. 2. Next come multiplications and divisions , from left to right. 3. Last come additions and subtractions , also from left to right.
The key point—and this is where many people go wrong—is that multiplication and division have the same priority . They are simply solved in the order they appear. The same applies to addition and subtraction.
The step-by-step solution (I promise, it’s crystal clear)
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