Decimal Number Lines Part 1

Consider the number line given below.

Let's find the decimal represented by the point r.

 

Observe that:

The distance between 0 and 1 is divided into 10 equal parts.

So, each part represents a length of one-tenth or 0.1.

 

Now, count the number of parts from 0 to r.

 

There are 8 parts.

 

This means that the point r is 8 parts to the right of 0 or 8 tenths after 0.

 

Now, 0 and 8 tenths equals 0.8.

 

So, the decimal represented by the point r is 0.8.