Here is a quick math challenge that looks simple but can trip up anyone who reads it too quickly: 140 − 30 × 0 + 2 = ? You do not need a calculator. You only need to remember the correct order of operations.
The correct answer
The answer is 142.
Step-by-step explanation
Multiplication comes before addition and subtraction. So begin by calculating 30 × 0 = 0.
The expression becomes 140 − 0 + 2. Now work from left to right: 140 − 0 = 140, and 140 + 2 = 142.
Why do people get this wrong?
A common mistake is to start with 140 − 30 because that is the first operation shown on the page. But subtraction must wait until the multiplication is finished. Another mistake is to believe that multiplying by zero makes the entire expression zero. It only makes the product immediately connected to the zero equal zero.
This little arithmetic puzzle is a great way to practice mental math. If you got 142 on your first attempt, well done. Try sharing it with a friend and comparing your answers.
