What is (1248.7 × 15.9)/40.1 approximately equal to?

Simplification & Approximation · Question 65 of 71

Question 65

MediumOriginal question

What is $\dfrac{1248.7 \times 15.9}{40.1}$ approximately equal to?

400Correct answerYour answer500Correct answerYour answer600Correct answerYour answer700Correct answerYour answer

Show the answer and explanation

CorrectNot quiteAnswer B

Correct answer: B

Round: $1248.7 \approx 1250$ , $15.9 \approx 16$ , $40.1 \approx 40$ .
Cancel before multiplying: $\frac{1250 \times 16}{40} = 1250 \times 0.4 = 500$ .

Worth noting

Cancelling first (16 over 40 is 0.4) saves a long multiplication. The exact value is about 495.

Ten questions from Simplification & Approximation, at your own pace.

Ten questions from Simplification & Approximation, at your own pace.