How to use this online book
In the desktop-computer version of this book, icons appear at the top of each page. On other devices, all or some of these icons may also appear.
Navigation: Navigate between pages using the arrows.
The table of contents can be toggled on or off using the Contents menu item:
Words can be searched for using Search button on the menu:
The font can be changed (e.g., enlarged) using the Font button on the menu:
A PDF version of the book can be downloaded using the PDF button on the menu:
In some places, interactive ‘quiz’ questions are given. In the online version, the background turns from red to green when the answer is correct. Try it now:
- What is \(1+1\)?
- What is \(1+2\)?
- Is \(2 + 2=4\)?