Calculating Triples and Four Times

Consider the following table having doubles of numbers:

1

Using the table, let's find the triple of 8.

8 + 8 + 8 = ?
 

First, find the double of 8,
 

8 + 8 + 8 = ?
 

16 + 8 = ?
 

Now, add
 

16 + 8 = 24
 

So, the triple of 8 is 24.