GCSE Maths (AQA)

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Number Structure and calculation

Multiplying Surds

4:35 Calculate exactly with fractions; calculate exactly with multiples of π; calculate exactly with surds; simplify surd expressions involving squares (eg √12 = √(4 × 3) = √4 × √3 = 2√3) and rationalise denominators
Spec N8
Previous Dividing Fractions Next Rationalising the Denominator
  • Multiplying thirds can result in a third or an integer.
  • Multiplying a third by itself always gives a whole rational number.
  • The square root of a number squared is equal to the number itself.
  • When multiplying surds with coefficients together, multiply the coefficients and the numbers in the roots separately.
  • The product of the coefficients and the product of the numbers in the square root give the final answer.

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264

questions for Number

210

questions for Structure and calculation