This resource contains two interactive excel files which deal with rounding of discrete and continuous variables and pose problems involving practical examples of calculations using rounded values.
The first interactive file shows two numbers rounded to the nearest integer and illustrates this on a number line. It also deals with the maximum and minimum values of the sum, difference, product and quotient of these rounded numbers. Subsequent sheets present problems using more practical applications of these skills and the starting values are rounded to the nearest 20, 5, 50, half hour and other amounts.
The next interactive file includes sets of numbers which are to be rounded to the nearest 10, 100 or 1000. The files also shows amounts of money which are to be rounded to the nearest £1, £5, £10 or £20 and decimals which are to be rounded to one, two or three significant figures. There is also the opportunity to round values to a given number of decimal places, significant figures or correct to given units.
There resources also include a range of worksheets which may be printed for classroom use.