Welcome to getting started with the BAII Plus 
calculator. I'm Joshua Emmanuel. In this video 
clip we're going to learn
how to set the BAII Plus calculator to our 
preferred mode of arithmetic operations.
The BAII Plus calculator uses two modes:  The 
Chain Mode & Algebraic Operating System  
Mode
By default the BAII Plus calculator is set to the 
Chain Mode.
To see this, press 2nd FORMAT
press 2nd FORMAT
Press the ↑ button
The display shows Chn
indicating that the calculator is operating in the 
chain (chn) mode
In this mode, the calculator solves the problem 
in order that you enter the operators.
For example, when you enter 5 + 4 × 2
The chain mode answer is 18,
which obviously is incorrect.
This is because the calculator first processes 5 
+ 4, obtains 9 
and multiplies the result by 2 to obtain 18. So in 
the chain (Chn) mode
the BAII Plus calculator solves the problem in 
the order that you enter the operators.
Lets us now look at the second mode called 
AOS, Algebraic Operating System
In this mode, the calculator solves the probblem 
according to the heirarchy of arithmetic 
operations like most scientific calculators do. 
That is, the calculator processes multiplication 
and division operations before addition and 
subtraction.
To access ths mode, Press 2nd FORMAT
Press the ↑ button,
and Press 2nd SET.  Now let us perfrom the 
same operation we did earlier on in this mode.
5 + 4 × 2
 and the result is 13.
This is because the calculator followed the order 
of operations and performed the multiplication 
before addition.
It first multiplies 4 by 2 to obtain 8 and then 
adds five to the result.
That was a quick overview of the two methods 
the BAII Plus calculator uses.
Thank you for watching
