Inequalities (Edexcel GCSE Maths): Flashcards

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Inequalities
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Meaning of >> symbol

Is greater than

Meaning of \geq symbol

Is greater than or equal to

Meaning of << symbol

Is less than

Meaning of \leq symbol

Is less than or equal to

Which direction does an inequality symbol point?

Towards the smaller number

What are error intervals?

Range of possible values when a number has been rounded

Which symbol for smallest value in error interval?

\leq (less than or equal to)

Which symbol for largest value in error interval?

<< (less than)

Error interval for 140m (nearest 10m)

135Height<145135 \leq \text{Height} < 145

Error interval for 4.7 (to 1 d.p.)

4.65x<4.754.65 \leq x < 4.75

Open circle on number line means

Value is not included

Closed circle on number line means

Value is included

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