Rounding and Approximation Techniques

The video tutorial explains how to perform estimations or approximations in calculations, often required in exams. It covers the method of rounding numbers to one significant figure and demonstrates how to calculate approximate values. The tutorial also shows how to simplify calculations to arrive at an estimated result, using examples to illustrate the process.

What is the first step in approximating a given calculation in an exam?

• Divide all the numbers

• Multiply all the numbers

• Round all the numbers to one significant figure

• Write out the calculation again

To what number is 41 rounded when approximating?

• 50

• 30

• 45

• 40

What is 198 rounded to when using one significant figure?

• 100

• 250

• 200

• 150

What is the approximate value of 800 divided by 8?

• 8

• 100

• 80

• 10

What is the final approximate value of the given calculation?

• 110

• 90

• 80

• 100