SCIENTIFIC CALCULATOR

11 Logarithms that are natural and powers of e using the calculator

Natural logarithms, like could be measured on an calculator using this key. Keys have two functions. key ( ) allows for the calculation of powers in the form of . The approximate value for the key itself is found by using the key sequence ( ).

Be aware that means exactly the same as ln. Some calculators include the key instead of .

20. Calculating natural logarithms and powers of E

Determine the value of each of these using your calculator Give the answers to 3 important figures.

The answer is revealed

12 Calculator reference guide

Calculator modes

General types

The calculator can operate in several different modes:

• COMP is a term used to do general calculations.
• STAT It is utilized to perform statistical calculations.
• TABLE is a tool used to create tables using numbers.

COMP is a short form for 'computation', and STAT is short for 'statistics'.

Comp mode is chosen by using the key sequence (COMP).

Mathematics and mathematics modes

There are two methods of displaying math input into and displayed on the calculator:

• Math mode, in which fractions are entered , and then displayed in their mathematical forms such as and some non-rational numbers will be shown as surds (such as ) or multiples of (such as ).Math mode is selected by using the key sequence (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 irrational number is one that can't be represented as a simple fraction.

You can tell that you're in Math mode if the word Math is displayed near the right-hand highest point of the calculator display. If this isn't displayed the word Math, then you're using Linear mode.

In Math mode you can cause an answer to be displayed as a decimal using either switch between the mathematical and decimal outputs using .

Fraction display modes

You can configure the calculator so that answers which are heavy on top (such for ) (such as) are displayed by way of mixed numbers (such such ).

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

Decimal display modes

The calculator can be set to display decimal numbers in several different ways:

• Normal 1 (Norm 1) mode makes use of scientific notation of any number smaller than 0.01 but greater than -0.01, and otherwise shows answers for whatever decimal places they are with the exception of the maximum number that can fit on the display. 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 larger than -0.000000001 however, it provides answers to whatever decimal places they can be with the exception of the maximum number that can be accommodated on the screen. This mode is entered using (SETUP) (Norm) .
• It is a mode that displays scientific notation (Sci) displays all decimal numbers in scientific notation and the number of significant figures. This mode can be entered by using (SETUP) (Sci) followed by the quantity of significant figures required for instance . When you are using your calculator is set in this mode, the indicator on your display is shown.
• Fixed decimal position setting (Fix) displays all decimal numbers within a specified the number of decimal decimal positions (unless the use of scientific notation required to make the results fit on the display). The mode is set by (SETUP) (Fix) followed by the decimal number required, for example . When you are using your calculator is in this mode there is a display indication FIX will be displayed.

12.1 Display indicators

These are symbols that are displayed on the calculator display to show its status at present.

Symbol on display	Meaning
	A key was pressed.
	A key has been hit.
M	A value is recorded in the memory of 'M'.
STO	The"STORE" key ( (STO)) was press.
RCL	The RECAL ( ) key has been pressed.
	The calculator is programmed to measure angles measured in degrees.
	The calculator is set 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 amount of decimal points.
SCI	The calculator will provide answers in scientific notation . a fixed number of significant figures.
Math	This calculator should utilize Math mode for data input, and for display.
STAT	The calculator is in statistical mode.
	There's more information to be found that can be displayed and can be accessed by using the up and down cursor keys.
	The line that is displayed is more than it can be displayed on the display. Other segments of the line are displayed using scrolling using the left and right cursor keys as well .

12.2 Common operations

To	Key sequence
Turn on
Turn off	(OFF)Note you that your calculator will automatically shut off in the event that it is not used for more than 6 minutes.
Modify the display's contrast	(SETUP) () Then use the settings and adjust, and press once completed.
Restore the factory settings	(CLR) (Setup) (Yes)
Clear the contents of all memories	(CLR) (Memory) (Yes)
Restore the default settings and erase all memory	(CLR) (All) (Yes)
Make a calculation unchangeable, or leave menus
Obtain an answer
Obtain a decimal answer in Math mode
Toggle between exact and decimal answer options in Math mode
To toggle between showing fractions in mixed numbers or improper fractions in Math mode
Use the result of this calculation...
... e.g. to find 42 times the previous result.
A value is stored in the memory 'M'	(STO) (M)
Clear a value that is stored in the memory of M	(STO) (M)
Create a new value in the memory 'M'
Subtract a value from the one in the memory of 'M'.	(M-)
Display the value that is stored in the memory 'M'.	(M)
Utilize the number in the memory 'M' in calculations...
... e.g. to find 42 minus the value in the memory "M"	(M)
Set angles to be measured in degrees	(SETUP) (Deg)
Set angles to be measured in Radians	(SETUP) (Rad)
Set the answer to be displayed according to 3 decimal place (To utilize a different number of decimal places, replace with that number)	(SETUP) (Fix)
Set answers to be displayed in scientific notation with 3 significant figures (To select a different amount in significant figures replace with that number)	(SETUP) (Sci)
Change any settings for rounding display	(SETUP) (Norm)

The A B, C, D, and X and Y memories are utilized in the same way as memories in the M memory with the exception that these have no subtracting or adding from' functions.