SCIENTIFIC CALCULATOR

11 The natural logarithms as well as the powers of e using the calculator

Natural logarithms such as they can be measured on the calculator using this key. The second function of this key ( ) is to allow the calculation of power of . Be aware that an approximate value for the key itself is calculated using the key sequence ( ).

Keep in mind that is that it is the same as. Some calculators include keys instead of key in place of .

Activity 20 Calculating natural logarithms and the powers of E

Determine the value of each of the following numbers using your calculator Give each of the three answers to three important figures.

Get the answer

12 Calculator reference guide

Calculator options

General types

The calculator can operate in several different modes:

• COMP is a term used for general calculations
• STAT is used to calculate statistical data.
• TABLE is a tool used to create tables using numbers.

COMP is the abbreviation for 'computation while STAT is short for'statistics'..

The Comp mode can be selected making use of the keys sequence (COMP).

Mathematics models

There are two methods that mathematics can be input to and displayed on the calculator:

• Math mode, where fractions can be entered and displayed in their mathematical forms for instance, and some non-rational numbers display as surds (such as ) or multiples of (such as ).Math mode is selected by following the sequence of keys (SETUP) (MthIO).
• Linear mode, in which fractions such as are entered and displayed using a linear notation - for example, 2 3 - and all irrational numbers (such as and ) are displayed as decimal approximations.Linear mode is selected by using the key sequence (SETUP) (LineIO).

Simply put, an irresponsible number can be expressed in terms of a simple fraction.

You will know you are in Math mode when the word Math is shown near the right-hand display at the top calculator display. If this doesn't appear it means you are in Linear mode.

In Math mode, you can force an answer to be displayed as a decimal using your keyboard, or toggle between the mathematical and decimal outputs by using .

Fraction display modes

The calculator can configure the calculator to display answers that are top-heavy fractions (such as ) will be shown with mixed numbers (such as ).

• To configure the calculator to display as mixed numbers, use the sequence key (SETUP) (ab/c).
• To set the calculator to display as top heavy fractions use to set the keysequence (SETUP) (d/c).

Decimal display modes

The calculator is able to display decimal numbers in several different ways:

• Normal 1 (Norm 1) mode makes use of scientific notation for numbers less than 0.01 but greater than -0.01 however, it displays answers to however decimal spaces they contain in the limit that is possible on the screen. This mode is entered using (SETUP) (Norm) .
• Normal 2 (Norm 2) mode uses scientific notation for any number less than 0.000000001 but greater than -0.000000001 but provides answers to whatever decimal places they can be within the limits that can be accommodated on the screen. The mode can be accessed via (SETUP) (Norm) .
• Science notation (Sci) displays all decimal numbers in scientific notation by using the specified number of important figures. This mode is entered using (SETUP) (Sci) followed by the amount of significant figures needed for instance . If you are using your calculator is set to this mode, the display indicator SCI appears displayed.
• Fixed decimal point modes (Fix) displays all decimal numbers to a specified the number of decimal decimal positions (unless some scientific terminology is required to display the result on the screen). The mode is set by (SETUP) (Fix) followed by the number of decimal places needed, for instance . When you are using your calculator is in this mode it displays an indicator for FIX will be displayed.

12.1 Display indicators

The symbols are displayed in the calculator display to show its current status of operation.

Symbol on display	Meaning
	You have pressed the key was held.
	This key was released.
M	The value is stored in the memory called 'M'.
STO	The key to store ( (STO)) was press.
RCL	The RECAL ( ) key was activated.
	The calculator is programmed to measure angles measured in degrees.
	The calculator is calibrated to measure angles in radians.
	The calculator is designed to measure angles in Gradians.
FIX	The calculator is set to show answers to a fixed number of decimal places.
SCI	The calculator will show answers in scientific notation . certain numbers of significant figures.
Math	The calculator will utilize Math mode for entry and displays.
STAT	The calculator is in statistical mode.
	There is more information available than can be displayed, and this can be accessed by using the up and down cursor keys.
	The line that is displayed is more than what is possible to fit on the display. Other lines are displayed by scrolling using the left and right keys for the cursor: along with .

12.2 Common operations

To	Key sequence
Turn on
Turn off	(OFF)Note in that calculator will shut down automatically in the event that it is not used for more than 6 minutes.
Adjust the display's brightness.	(SETUP) () then use and modify, and press when you are done.
Restore the factory settings	(CLR) (Setup) (Yes)
Clean out all memories	(CLR) (Memory) (Yes)
Restore the default settings , and then erase all of the memories	(CLR) (All) (Yes)
Refuse to calculate a number, or exit menus
Find out the answer
Calculate a decimal number in Math mode
Switch between decimal and exact answer options in Math mode
Toggling between showing fractions either as mixed numbers or as improper fractions in Math mode
Utilize the results of earlier calculation...
... e.g. to find 42 minus the previous result
Write a value into Memory 'M'	(STO) (M)
Clear a value that was stored in the M memory	(STO) (M)
Add a value to that in the memory of 'M'
Subtract a value from the one in memory 'M'	(M-)
Display the value that is stored in the memory of 'M'.	(M)
Use the value in the memory "M" in calculations...
... e.g. to find 42 minus the memory with the letter 'M'.	(M)
The angles that are which will then be measured as degrees	(SETUP) (Deg)
Determine angles which will be measured using radians	(SETUP) (Rad)
Set the answer to be presented in three decimal places (To select a different amount of decimal decimal places, replace with the number)	(SETUP) (Fix)
Answers to questions are displayed in scientific notation , with three significant figures (To utilize a different number of significant figures, replace this number)	(SETUP) (Sci)
Remove any rounding settings that affect display.	(SETUP) (Norm)

The A B, C D, X, and Y memories are used in the same manner as those of the M memory, except that these have no subtracting or adding from' functions.