Doing Arithmetic

The “v ” in the margin is a reminder that the example keystrokes are for ALG mode.

This is a brief introduction to doing arithmetic. More information on arithmetic is in chapter 2. Remember that you can erase errors by pressing <or C.

To calculate 21.1 23.8:

Keys: Display:Description:

21.1+ 

23.8

=



=completes calculation.

Once a calculation has been completed, pressing another digit key starts a new calculation. On the other hand, pressing an operator key continues the calculation:

77.35 -



Calculates 77.35

– 90.89

90.89 =



 

 

65 @v*12

New calculation:

 

=



65 x 12.

 

/3.5 =



Calculates 96.75

3.5.

You can also do long calculations without pressing = after each intermediate calculationjust press it at the end. The operators perform from left to right, in the order you enter them. Compare:

 

 

65 + 12

 

and

65 +

12

 

 

3.5

 

 

 

 

 

3.5

65 +12 /

 

Operations occur in the

3.5 =



 

order you see them.

 

 

 

 

 

1: Getting Started 21

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