Estimation (AQA GCSE Maths): Quizzes

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Estimation
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10 questions from this quiz

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What is the main purpose of estimation in maths?

To find approximate answers easily

When estimating, what should you round each number to?

1 significant figure

What does the symbol \approx mean?

Is approximately equal to

Estimate 4.32×18.094.32 \times 18.09 by rounding to 1 sf.

8080

Estimate 3272327^2 by rounding to 1 sf.

90,00090,000

What trick helps with decimal division on non-calculator papers?

Multiply both numbers by same amount

Using laws of indices, 403=(4×10)340^3 = (4 \times 10)^3 equals what?

43×1034^3 \times 10^3

For estimating on non-calculator papers, what should π\pi be rounded to?

33

If you round both numbers down in a calculation, your estimate is a(n):

Underestimate

What should you always do in exams when estimating?

Show your working for method marks

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