UNIT 3.2 ROUNDING (DECIMALS)
DEGREE OF ACCURACY
Rounding decimals means making a number simpler but keeping its value close to what it was. To round, look at the digit to the right of the one you want to round to. If it's 5 or greater, add 1 to the digit you want to round to. If it's 4 or less, just leave the digit you want to round to as it is.
What is the difference between rounding to the nearest whole number and rounding to a given number of decimal places?
Did you know?
The word 'round' comes from the Latin word 'redundare' which means 'to make full again' The first use of a symbol for rounding dates back to the 5th century AD In mathematics, a number is considered to be 'rounded' when it is neither greater nor less than the original number
If you have a decimal number like 3.78 and you need to round it to the nearest whole number, what would be the result and why?
Round 5.592 to the nearest hundredth.
Round $278.49 to the nearest hundred dollars.
Round off 5.662198 to 4 d.p.
If I round off 34.8972 to 2 d.p., the answer would be 34.9
Round off 78.931 to 2 d.p.
What is the equivalent decimal place value of hundredth?
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