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Brainlag Learn / GCSE Maths

Place value, rounding and bounds

The number skills every other topic leans on: place value, calculating without a calculator, factors and primes, rounding, estimating and bounds.

Lessons

  1. Place value and orderingWhat each digit is worth, how to put decimals and negative numbers in order, and the symbols that compare them. 20 min, free
  2. The four operationsWritten methods without a calculator, negative numbers, the order of operations, and counting combinations. 25 min, with the Scientific Calculator, free
  3. Factors, multiples and primesFactors, multiples and primes, writing a number as a product of primes, and the HCF and LCM, with the problems they solve. 25 min, free
  4. Rounding and estimatingRound to decimal places and significant figures, estimate by rounding to one significant figure, and truncate. 25 min, with the Scientific Calculator, free
  5. Error intervals and boundsThe range of values a rounded or truncated number could have been, and the greatest and least results of a calculation with them. 25 min, with the Scientific Calculator, free

Practise and test

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