Rounding (Junior Cert Mathematics): Flashcards
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12 cards from this deck
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Practise the cards
12 cards from this deck
What is rounding?
What is rounding?
A process to reduce the number of digits while keeping the value close to the original
Two types of rounding
Two types of rounding
Decimal places and significant figures
What are decimal places?
What are decimal places?
Digits to the right of the decimal point
Rounding rule when next digit is 5 or more
Rounding rule when next digit is 5 or more
Round up
Rounding rule when next digit is 4 or less
Rounding rule when next digit is 4 or less
Round down
What are significant figures?
What are significant figures?
Digits that carry meaning contributing to a number's precision
Non-zero digits (1-9) as sig figs
Non-zero digits (1-9) as sig figs
Always significant
Zeros between non-zero digits
Zeros between non-zero digits
Always significant
Leading zeros in decimals (e.g. )
Leading zeros in decimals (e.g. )
Not significant (placeholders)
Zeros after decimal AND after non-zero digit
Zeros after decimal AND after non-zero digit
Significant