ten thousands	thousands		hundreds	tens	ones
1	2	,	3	4	5

Example:

Example:

In mathematics, estimating is a way of approximating an answer without using the exact values.
People estimate in different ways.
There isn't always a right way and a wrong way with estimation.
However, an estimation is sometimes good, and sometimes not.
And, some estimations might be better than others.

Example:

Example: