Bounds (AQA GCSE Maths): Quizzes

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Bounds
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What do bounds tell us about a measurement?

The range of possible actual values

For rounded measurements, how much bigger or smaller can the actual value be?

Up to half a unit

A mass is 2.42.4 kg to the nearest 0.10.1 kg. What is the lower bound?

2.352.35 kg

A length is 5.35.3 m to 1 d.p. What is the upper bound?

5.355.35 m

Which inequality symbols relate the value to its bounds? (lower bound ? value ? upper bound)

\leq and <<

For truncated measurements, how much bigger can the actual value be?

A whole unit bigger

A mass of 2.42.4 kg is truncated to 1 d.p. What are the bounds?

2.4m<2.52.4 \leq m < 2.5 kg

To find maximum area, which bounds of length and width should you multiply?

Upper × upper

To find the maximum value of a÷ba \div b, which bounds should you use?

Upper aa ÷ lower bb

The upper bound for people in a room is 154.999...154.999.... What is the maximum whole number?

154154 people

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