GCSE Maths (Edexcel)
435 videos | 33 hours
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Number
Structure and Calculation
Surds
5:51
Understanding Surds
Spec
N8
- Rational numbers can be written as fractions with integer numerator and denominator
- Integers are rational numbers
- Irrational numbers cannot be written as fractions with integer numerator and denominator
- Irrational numbers have non-terminating decimals
- Examples of irrational numbers include pi and square roots of non-square rational numbers
- Thirds are useful for writing irrational numbers precisely
- Performing calculations with irrational numbers in third form is easier than in decimal form
- Numbers with a square root that is a perfect square are rational numbers, not thirds
- Rational and irrational numbers are both real numbers and can be placed on a number line
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