Rounding Numbers (Edexcel GCSE Maths): Quizzes

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Rounding numbers
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12 questions from this quiz

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What is the 'decider' when rounding?

The digit immediately to the right

What value must the decider be to round up?

5 or more

What is 7.458397.45839 rounded to 22 decimal places?

7.467.46

When rounding up a 99, what should you do?

Replace with 00 and carry 11 left

What is 64.99664.996 rounded to 22 decimal places?

65.0065.00

What is the first significant figure of 0.0023090.002309?

22

In 2.030702.03070, which zeros are significant figures?

All zeros after the 22

How many significant figures are in 0.0023090.002309?

44

After rounding to sig figs, when should you add zeros?

Up to, not beyond, decimal point

What is 54.765154.7651 rounded to 11 significant figure?

5050

What is the first step when estimating a calculation?

Round to 11 or 22 sig figs

When is estimation particularly useful?

To check calculator answers

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