**LESSON NOTE**

In this chapter, we will learn to

- Round off numbers to a required number of decimal places
- Round off numbers to a required number of significant figures
- Estimate the results of computation
- Understand the concepts of rounding & truncation errors

Let's revisit something we know...

Rounding Off Numbers to a required number of Decimal places

Quick Notes:

Try the following to recall what you are familiar with...

Activity 1: BBC Skillwise "Rounding & Estimating Number" Quiz

Activity 2: Rounding Quiz

- Here's another quiz to round numbers to the nearest thousands, ten thousands, hundred thousands, and millions.

- Click at "CLICK HERE TO TAKE TEST" to start the quiz.

- http://www.softschools.com/quizzes/math/rounding/quiz837.html

- This is a game that you can choose to 'earn' 1, 2 or 3 points in each successful 'throw' of the basketball
- http://www.mrnussbaum.com/rounding/index.html

- In this game, you will complete the course using estimation skills in as few strokes as possible.
- http://www.mrnussbaum.com/estimationvalley.htm

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