In mental division, there is an Inflation Method (named by me) that magnifies the number to obtain an easier and better number to manipulate mentally.
Another sister method of Inflation method is the so-called Deflation Method.
In this Deflation method of Mental Maths division, we need to scale down to a "better" number.
Examples of "better"number can be 2 and 10.
But do note that both number has to be even for the reduction or deflation.
Let us do an example to illustrate the case.
164 / 16
You will notice that 16 can be scaled down to 8 by dividing the denominator 16 by 2.
The numerator has to follow suit too.
Therefore 164 / 2 = 82.
164 / 16 ==> 82 / 8
Using the numerator approach mental division method,
82 / 8 ==> ( 80 + 2) / 8
==> (80 / 8) + ( 2 /8 ) ==> 10 2/8
==> 10 1/4 ANSWER.
These cute mental steps for the division are not complicated.
They make use of "better" number to perform tasks that the mind can handle, that is, use small manageable number to do the maths operation.
It applies the saying "Keep it short and simple!".
With simplicity, the mind will be clearer.