Rounding numbers (Edexcel GCSE Maths): Flashcards
📚Flashcards
Practise the cards
13 cards from this deck
ShowHide
Practise the cards
13 cards from this deck
What is rounding?
What is rounding?
Making a number simpler by reducing digits, keeping value close
Golden rule: when to round up?
Golden rule: when to round up?
If digit is 5 or more, round up
Golden rule: when to round down?
Golden rule: when to round down?
If digit is less than 5, round down
Which digit do you look at when rounding?
Which digit do you look at when rounding?
The digit immediately to the right of target place value
What are decimal places (d.p.)?
What are decimal places (d.p.)?
Number of digits after the decimal point
Rounding to 1 d.p.: which digit to check?
Rounding to 1 d.p.: which digit to check?
Second decimal place (hundredths column)
Round to 1 d.p.
Round to 1 d.p.
Rounding to nearest whole: which digit to check?
Rounding to nearest whole: which digit to check?
Tenths column (first decimal place)
What are significant figures (s.f.)?
What are significant figures (s.f.)?
The meaningful digits in a number
Where to start counting significant figures?
Where to start counting significant figures?
From the first non-zero digit on the left
Do leading zeros count as significant figures?
Do leading zeros count as significant figures?
No, leading zeros are not significant
Round to 1 s.f.
Round to 1 s.f.
Should you include trailing zeros when rounding to d.p.?
Should you include trailing zeros when rounding to d.p.?
Yes, to show the precision