2.3 Link words

A lot of people use the equals sign wrongly in places where another word or phrase might actually make the meaning clearer. Sometimes a link word or phrase is useful at the beginning of a mathematical sentence: examples include ‘So’, ‘This implies’ or ‘It follows that’ or ‘Hence’.

Example 3

Add link words and punctuation to the calculation below to help somebody else to follow it.

Answer

Notice that mathematical calculations are often easier to read if all the equals signs are aligned underneath one another.