Approximations, decimal places and significant figures
##### Videos in this series
Please select a video from the same chapter
Chapters
Introduction
Learning Objectives
Recap of past learning
Rounding numbers ... why do we need to?
How do we round numbers to a certain number of decimal places?
Rounding numbers without decimal places
Scientific notation
All numbers can be written in scientific notation
All numbers can be written in scientific notation with decimal numbers
Bouncing decimals
Examples
Doing things backwards
Significant figures
Examples of significant figures
Summary
Approximations, decimal places and significant figures
Computation and practical arithmetic
Year 11
This videos looks at why we need to approximate and how we can use different methods to find approximations. I look at Usain Bolts time of 9.58 and wonder if that was his actual time. I show how to round to a certain number of decimal places. I look at significant figures. I have lots of worked examples all explained using clear and easy to understand theory. This is another video as part of the General Maths Units 1 and 2 course.
Published: July 14, 2020
Length: 25 mins and 55 seconds
Lesson notes