8: Techniques of Estimation Last updated Save as PDF Page ID 48884 Denny Burzynski & Wade Ellis, Jr. College of Southern Nevada via OpenStax CNX 8.1: Estimation by Rounding 8.2: Estimation by Clustering 8.3: Mental Arithmetic—Using the Distributive Property 8.4: Estimation by Rounding Fractions Estimation by rounding fractions is a useful technique for estimating the result of a computation involving fractions. Fractions are commonly rounded to 1/4, 1/2, 3/4, 0, and 1. Remember that rounding may cause estimates to vary. 8.5: Summary of Key Concepts 8.6: Exercise Supplement 8.7: Proficiency Exam