2

Arithmetic

If you prefer RPN to algebraic logic, please read appendix D before you read this chapter. The “ v “ in the margin is a reminder that the example keystrokes are for ALG mode.

The Calculator Line

The calculator line is the part of the display where numbers appear and calculations take place. Sometimes this line includes labels for results,

such as . Even in this case you can use the number vfor a calculation. For example, pressing + 2 = would calculate

124.60 plus 2, and the calculator would display the answer, 126.60.

There is always a number in the calculator line, even though some-

times the calculator line is hidden by a message (such as  ). To see the number in the calculator line, press <, which removes the message.

vDoing Calculations

Simple calculating was introduced in chapter 1, page 21. Often longer calculations involve more than one operation. These are called chain calculations because several operations are “chained” together. To do a chain calculation, you don’t need to press =after each operation, but only at the very end.

For instance, to calculate 750 12 you can type either: 360

750*12 =/360 =

or

750*12 /360 =

38 2: Arithmetic

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