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)

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

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

4.65≤x<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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