Psion Teklogix Schnellstart- Anleitung 7525 ユーザーズマニュアル

Figure 7.67 Insert Function Screen

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Tap on the formula you want to use

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for this example, the SUM formula 

was used

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‘SUM(number1,number2,...)’, and tap on OK.

Figure 7.68 Inserting A Function

In this example, in the parentheses, the SUM function sample indicates that numbers 
(or cell coordinates) be separated by commas.

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In the entry bar, delete the example information in the parentheses

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in this 

example, (number1,number2...).