Rounding Numbers (Edexcel GCSE Maths): Flashcards
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14 cards from this deck
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Practise the cards
14 cards from this deck
Two main ways to specify rounding
Two main ways to specify rounding
Decimal places and significant figures
The 'decider' in rounding
The 'decider' in rounding
Digit immediately to right of last digit
Rounding rule when decider
Rounding rule when decider
Round up
Rounding rule when decider
Rounding rule when decider
Keep last digit unchanged
Rounding up a 9
Rounding up a 9
Replace 9 with 0 and carry 1 to the left
First significant figure definition
First significant figure definition
First digit that isn't zero
When zeros are significant figures
When zeros are significant figures
When they appear after the first non-zero digit
Sig figs: zeros after decimal point rule
Sig figs: zeros after decimal point rule
Never add extra zeros after decimal point
Sig figs: filling zeros rule
Sig figs: filling zeros rule
Fill zeros up to (but not beyond) decimal point
First step in estimation
First step in estimation
Round to convenient numbers (1-2 sig figs)
Why show working in estimation
Why show working in estimation
To prove you haven't used a calculator