For most IGCSE estimating questions, round each number to [ ] before calculating.
one significant figure
two significant figures
one decimal place
the nearest integer
Flashcards for Oxford AQA IGCSE Maths Estimating, covering the key terms, formulae and methods you need to recall for Paper 1 and Paper 2 (Core: 1C and 2C; Extension: 1E and 2E). 22 cards, matched to the Oxford AQA IGCSE Maths (9260) specification.