What is the value of the expression \(7+3^2\cdot5\)?
Answer and explanation
Correct answer: 52
According to the order of operations, first calculate \(3^2=9\), then \(9\cdot5=45\), and finally \(7+45=52\). Therefore, the correct answer is 52. The value 45 is only an intermediate result after multiplication, not the final answer. Exam tip: evaluate exponents first, followed by multiplication or division, and then addition or subtraction.
Frequently asked questions
What is the correct answer to this question?
52
Why is this the correct answer?
According to the order of operations, first calculate \(3^2=9\), then \(9\cdot5=45\), and finally \(7+45=52\). Therefore, the correct answer is 52. The value 45 is only an intermediate result after multiplication, not the final answer. Exam tip: evaluate exponents first, followed by multiplication or division, and then addition or subtraction.
Which subject and chapter does this question cover?
This is a Class 10 Mathematics question. Chapter: Polynomials. Topic: Operations on real numbers and the laws of exponents.
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