Practise the method.Example 1Find the exact value of 369+369+369.Show worked answerAnswer: 69Add the fractions exactly before rounding: 3×369=69.Example 2Each of three copies of 31 is first rounded to 0.33. What is the absolute error in their total?Show worked answerAnswer: 0.01Exact total =1. Rounded total =0.99. Absolute error =∣0.99−1∣=0.01.Example 3Which method best avoids accumulated rounding error?Show worked answerAnswer: Keep exact values or extra digits until the final resultRepeated rounding can accumulate error. Retain exact values or guard digits and round the final result as requested.