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Question

Difficulty: EasyOrder of Operations

What is the value of the following expression?

15−3×4+215 - 3 \times 4 + 2
  1. 5Answer
  2. B
    50
  3. C
    1
  4. D
    -1

Answer

5
The correct answer is found by properly applying the order of operations. Multiplication takes precedence over subtraction and addition, so 3 * 4 is evaluated first to get 12. The expression then becomes 15 - 12 + 2. Because subtraction and addition have the same priority, they are evaluated from left to right. Subtracting 12 from 15 gives 3, and adding 2 to 3 gives the final result of 5.

Step-by-Step Solution

1
Perform the multiplication operation first.
3×4=123 \times 4 = 12
According to the order of operations (PEMDAS), multiplication must be completed before addition and subtraction.
2
Substitute the result back into the expression and subtract.
15−12=315 - 12 = 3
Addition and subtraction are of equal priority, so they are evaluated from left to right.
3
Perform the final addition operation.
3+2=53 + 2 = 5
This is the final remaining operation in the expression.

Key Concept

Order of Operations
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Topics

Order of Operations

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