Rounding to a Given Place Value
Rounding to a Given Place Value
Rounding to a given place value
How do I round a number to a given place value?
Identify the digit in the required place value
Identify the two options that the number could round to
Count in the units you are rounding to,
Find the first value below and the next value above the number you are rounding
E.g. Round 1294 to the nearest 100, count in 100's
The number will round down to 1200 or up to 1300
Be careful if your digit is a 9 and the next number up will affect the higher place values
E.g. Rounding 1798 to the nearest 10, count in 10's
The number will round down to 1790 or up to 1800
Circle the number to the right of the required place value
If the circled number is 5 or more then you round to the bigger number
If the circled number is less than 5 then you round to the smaller number
Put a zero in any following place values before the decimal point
E.g. 1567.45 to the nearest 100 would be 1600
How do I round a number to a given decimal place?
Identify the position of the decimal place you are rounding to
Identify the two options that the number could round to
E.g. Round 7.82741 to 3 d.p., count in 0.001's
The number will round down to 7.827 or up to 7.828
Circle the number to the right of the required decimal place
If the circled number is 5 or more then you round to the bigger number
If the circled number is less than 5 then you round to the smaller number
E.g. 2.435123 to the nearest 2 d.p. would be 2.44
When rounding to decimal places make sure you leave your answer with the required amount of decimal places
Do not put any zeros after the position of the decimal place you are rounding to
E.g. 1267 to the nearest 100 is 1300
But 1.267 to two decimal places (nearest 100th) is 1.27 not 1.270
If asked for a certain number of decimal places, you must give an answer with that number of decimal places
E.g. 2.395 to two decimal places is 2.40 (do not write 2.4)