Making Approximation

How to do Approximate Calculation

Tips & Tricks for Approximate Calculation

Last Updated on Oct 16, 19

The mantra to master approximate calculation is to Practice& Quick Calculation. Remember the BODMAS rule and all the Square Roots, Cube Roots & Tables should be on tips. If these things are mastered, then it is very easy to score marks in the Quant section.

One very simple form of estimation is rounding. Rounding is often the key skill you need to quickly estimate a number. This is where you make a long number simpler by ‘rounding’, or expressing in terms of the nearest unit, ten, hundred, tenth, or a certain number of decimal places.

Probably the simplest way to estimate is to round all the numbers that you are working with to the nearest 10 (or 100, if you are working in thousands at the time) and then do the necessary sum.

Some Tips & Tricks to do Approximate Calculation
  1. Remember to have all the multiplication tables up to 20, squares up to 30, cubes up to 20, and fraction tables (1/n) on your tips.
  2. Perform Average Addition, Subtraction, Multiplication & Divisions taking cases from your daily life.
  3. Do not stop your practice and revision process. Continuity plays a major role in mastering something.
  4. For Quick Calculations use ABACUS or Vedic Math rules.

This video lays out the basics of Making Approximate Calculations. Understanding this topic well is necessary to solve questions that are asked in various competitive exams in the Quant and DI sections - applicable to CAT, XAT, MAT, SNAP, IIFT, CLAT, AILET, DU LLB, any other entrance exam as well.

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