GCSE Secondary Maths Age 13-17 - Number: Error Interval - Explained

What is the first step in determining the error interval for a number rounded to one decimal place?

• Calculate the midpoint of the bounds

• Find the upper and lower bounds

• Round the number to two decimal places

• Identify the number's original value

If a number is rounded to 7.2, what is the lower bound of its error interval?

• 7.15

• 7.1

• 7.25

• 7.3

What is the upper bound of the error interval for a number rounded to 7.2?

• 7.25

• 7.2

• 7.3

• 7.15

Why is the upper bound of the error interval not included in the interval itself?

• To make calculations easier

• To prevent rounding up

• To ensure the number rounds to 7.3

• To avoid rounding down

How many marks are typically awarded for finding the error interval in an exam question?

• One mark

• Two marks

• Three marks

• Four marks