SCIENTIFIC CALCULATOR

11 Logarithms that are natural and the powers of E on your calculator

Natural logarithms like those, for example could be assessed using the calculatorusing this key. Keys have two functions. key ( ) allows the calculation of power of . The approximate value for the key itself is found by using the key sequence ( ).

Take note that refers to the same thing as ln. Certain calculators come with an key rather than .

Activity 20 Calculating natural logarithms and the powers of e

Calculate the value of each of these using your calculator with each answer to 3 significant figures.

Get the answer

12 Calculator reference guide

Calculator options

General modes

The calculator operates in many different modes:

• COMP, which is utilized for general calculations.
• STAT It is utilized for statistical calculations.
• TABLE, which is employed to create tables of numbers.

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

Comp mode is set by the use of the keyboard sequence (COMP).

Mathematics modes

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

• Math mode, where fractions can be entered and displayed in their proper mathematical form - for example, - and some irrational numbers will be shown as surds (such as ) or multiples of (such as ).Math mode can be selected selecting the keysequence (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).

Put simply, an irrational number can be expressed as a simple fraction.

It is obvious that you are in Math mode when the word Math is shown near the right-hand side of the high-end of the calculator display. If it's not then you're in Linear mode.

In Math mode you can set an answer to be displayed in decimal form an option or switch between decimal and mathematical outputs with .

Fraction display modes

The calculator can configure the calculator so that answers which are heavy on top (such like ) (such as) are always presented with mixed numbers (such as ).

• To set the calculator to display as mixed numbers, you must use this key sequence (SETUP) (ab/c).
• To make the calculator to display as top-heavy fractions, use your key sequence (SETUP) (d/c).

Decimal display modes

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

• Normal 1 (Norm 1) mode makes use of scientific notation of any number smaller than 0.01 but higher than -0.01 in other cases, and also displays answers to however decimal places they are, subject to the maximum that is possible on the screen. This mode can be entered by using (SETUP) (Norm) .
• Normal 2 (Norm 2) mode employs scientific notation for any number less than 0.000000001 but higher than -0.000000001 However, it also shows the answer to as many decimal places they are with the exception of the maximum number that can be accommodated on the display. This mode is controlled by (SETUP) (Norm) .
• The mode of scientific notation (Sci) displays every decimal number in scientific notation with a specified number of significant figures. This mode can be entered by using (SETUP) (Sci) followed by the number of significant figures to be used, for example . When you are using your calculator is set to this mode, the display indicator SCI will be displayed.
• Fixed decimal position Mode with fixed decimal places (Fix) displays all decimal numbers to the specified the number of decimal decimal positions (unless some scientific terminology is needed to match the result to the display). The mode is set by (SETUP) (Fix) followed by the decimal number needed, such as . When your calculator is in this mode the display indicator FIX will be displayed.

12.1 Display indicators

The symbols are displayed across the calculator display to show its status at present.

Symbol on display	Meaning
	You have pressed the key was released.
	The key has been held.
M	A value is stored in the 'M' memory.
STO	The key for STORE ( (STO)) is held.
RCL	The RECALL ( ) key was held.
	The calculator is designed to measure angles in degrees.
	The calculator is programmed to measure angles in radians.
	The calculator is set to measure angles in gradians.
FIX	The calculator is set to show results to a predetermined the number of decimal positions.
SCI	The calculator is set to show the results in scientific notation and some fixed numbers of relevant figures.
Math	This calculator has been set to make use of Math mode for both input and output.
STAT	The calculator is in stats mode.
	There's more information available than is displayed and it can be accessed with the use of the up/down mouse keys.
	The line shown is larger than can fit on the screen. Other parts of the line can be displayed using scrolling left and right keys for the cursor: or .

12.2 Common operations

To	Key sequence
Turn on
Turn off	(OFF)Note it is important to note that this calculator will turn off itself in the event that it is not used for more than 6 minutes.
Modify the display's contrast	(SETUP) () then use it and adjust, then press when done.
Restore the factory settings	(CLR) (Setup) (Yes)
Clean out all memories	(CLR) (Memory) (Yes)
Restore the default settings , and then erase all memories	(CLR) (All) (Yes)
Make a calculation unchangeable, or get rid of menus
Find out the answer
Obtain a decimal answer in Math mode
Switch between decimal and exact solutions in Math mode
You can toggle between showing fractions as mixed numbers or fractions that are incorrect in Math mode
Apply the result of prior calculation...
... e.g. to find 42 minus the previous result.
Store a value in memory called 'M'	(STO) (M)
Clear a value in the memory of M	(STO) (M)
Include a value in the memory 'M'
Subtract the value of in the memory of 'M'.	(M-)
Display the value that is stored in the memory of 'M'.	(M)
Utilize the value of the memory of 'M' to perform a calculation...
... e.g. to find 42 less the value of the memory 'M'	(M)
The angles that are to be measured in degrees	(SETUP) (Deg)
Determine angles which will be measured using radians	(SETUP) (Rad)
Set answers to be displayed with 3 decimal points (To utilize a different number of decimal decimal places, replace with that number)	(SETUP) (Fix)
Set the answers to be displayed in scientific notation with three significant figures (To select a different amount of important figures replace by that number)	(SETUP) (Sci)
Cancel any display rounding settings	(SETUP) (Norm)

The A B, C D, and X and Y memories are used similarly to the M memory, except that they lack add to' or subtract from' functions.