Rounding Numbers (AQA GCSE Maths): Flashcards
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Practise the cards
10 cards from this deck
Two main approaches to rounding numbers
Two main approaches to rounding numbers
Decimal places and significant figures
What decimal places rounding focuses on
What decimal places rounding focuses on
How many digits appear after the decimal point
The decider in rounding
The decider in rounding
The digit immediately to the right of the last digit
Decider rule: if decider is 5 or more
Decider rule: if decider is 5 or more
Round the last digit up
Decider rule: if decider is 4 or less
Decider rule: if decider is 4 or less
Keep the last digit as it is
What happens when rounding up a 9?
What happens when rounding up a 9?
Replace 9 with 0 and carry 1 to the left
What are significant figures?
What are significant figures?
Meaningful digits that contribute to a number's precision
First significant figure in any number
First significant figure in any number
The first digit that isn't zero
After rounding sig figs, what to do with zeros?
After rounding sig figs, what to do with zeros?
Fill in zeros up to the decimal point, but never add zeros after it
Do leading zeros count as significant figures?
Do leading zeros count as significant figures?
No, they don't count