2-2-7

Basic Calculations

SUsing the tButton to Toggle between the Standard Mode and DecimalMode

You can tap tto toggle a displayed value between Standard mode and Decimal mode format.

Note that tapping ttoggles the format of a displayed value. It does not change the current Standard mode/Decimal mode setting.

Example 1: Tapping twhile the ClassPad is configured for Standard mode (Normal 1) display

Expression

ClassPad OperationDisplayed Result

 

 

 

 

 

 

@??Et

16.66666667

 

 

 

 

(Switches to Decimal mode format.)

 

100 ÷ 6 = 16.6666666...

 

 

 

t(Switches back to Standard mode

 

50

 

 

 

 

format.)

3

 

 

 

 

 

 

Example 2: Tapping twhile the ClassPad is configured for Decimal mode (Normal 1) display

Expression

ClassPad Operation

Displayed Result

 

 

 

 

AAt

2 + 2

2 + 2 = 3.414213562...

(Switches to Standard mode format.)

 

 

 

 

 

t(Switches back to Decimal mode format.)

3.414213562

 

 

 

SNumber of Decimal Places, Number of Significant Digits, Normal DisplaySettings

The [Number Format] settings on the Basic Format dialog box (page 1-9-4) specify the number of decimal places, the number of significant digits, and the normal display setting for Main application Decimal mode calculation results. The following shows how calculation results appear under each setting.

Expression

Normal 1

Normal 2

Fix 3Sci 3

 

 

 

 

 

50 ÷ 4 = 12.5

12.5

12.5

12.500

1.25E + 1

 

 

 

 

 

100 ÷ 6 = 16.6666666...

16.66666667

16.66666667

16.667

1.67E + 1

 

 

 

 

 

1 ÷ 600 = 0.00166666...

1.666666667E –3

0.00166666666

0.002

1.67E – 3

 

 

 

 

 

1011 ÷ 4 = 2.5E + 10

2.5E + 10

2.5E + 10

2.5E + 10

2.50E + 10

 

 

 

 

 

The allowable range for the number of decimal places is Fix 0 to Fix 9, and the range for the number of significant digits is Sci 0 to Sci 9. For details about the [Number Format] settings, see “Basic Format Dialog Box” on page 1-9-4.

IComplex Mode and Real Mode

The Complex mode is for complex number calculations, while the Real mode is limited to calculations within the range of real numbers. Performing a calculation in the Real mode that produces a result that is outside the range of real numbers causes an error (Non-Real in Calc).

20090601