Which expression represents subtracting (7) from the product of (m) and (n)?
Answer and explanation
Correct answer: \(mn-7\)
The product of \(m\) and \(n\) is \(mn\). Subtracting 7 from this product gives \(mn-7\), so option D is correct. In \(7-mn\), the product \(mn\) is subtracted from 7, which is a different expression. Exam tip: In phrases such as “subtract from,” write the quantity from which subtraction is made first.
Frequently asked questions
What is the correct answer to this question?
\(mn-7\)
Why is this the correct answer?
The product of \(m\) and \(n\) is \(mn\). Subtracting 7 from this product gives \(mn-7\), so option D is correct. In \(7-mn\), the product \(mn\) is subtracted from 7, which is a different expression. Exam tip: In phrases such as “subtract from,” write the quantity from which subtraction is made first.
Which subject and chapter does this question cover?
This is a Class 9 Mathematics question. Chapter: Introduction to Polynomials. Topic: Algebraic expressions.
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