SCIENTIFIC CALCULATOR

11 Natural logarithms and the power of E with the calculator

Natural logarithms for instance they can be measured using the calculator using this key. Keys have two functions. key ( ) permits the calculation of power for . Note that an approximate value for its own value can be determined using the key sequence ( ).

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

Activity 20 Calculating natural logarithms and powers of E

Calculate the amount of each of the following numbers using your calculator, giving each of the three answers to three important figures.

Reveal answer

12 Calculator reference guide

Calculator uses various modes

General methods

The calculator can operate in several different modes:

• COMP is a term used to do general calculations.
• STAT is a statistical program that can be used to calculate statistics.
• TABLE, which is used for generating tables of numbers.

COMP is the abbreviation for 'computation', and STAT is the abbreviation for'statistics'..

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

Mathematics models

There are two distinct ways that mathematics can be applied to and displayed by the calculator:

• Math mode, in which fractions can be entered and displayed in their mathematically correct form like or some odd numbers will be shown as surds (such as ) or multiples of (such as ).Math mode is selected by making use of the keyboard 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 which cannot be represented as a simple fraction.

You can tell that you're in Math mode if the word Math is shown near the right-hand high-end of the calculator display. If it isn't then you're in Linear mode.

In Math mode you can make the answer to display as a decimal your keyboard, or toggle between decimal and mathematical outputs with .

Fraction display modes

There is the option to configure the calculator so that numbers that are heavy on top (such as ) (such as) are always presented in mixed number format (such as ).

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

Decimal display modes

The calculator can be programmed to display decimal numbers in various different ways:

• Normal 1 (Norm 1) mode uses scientific notation for numbers less than 0.01 but greater than -0.01 in other cases, and also displays answers according to the decimal places they're located up to the maximum that can fit on the display. This mode can be accessed via (SETUP) (Norm) .
• Normal 2 (Norm 2) mode employs scientific notation for any number smaller than 0.000000001 but more than -0.000000001 however, it displays the answers in whatever decimal places they can be in the limit that will fit on the screen. This mode can be entered by using (SETUP) (Norm) .
• Scientistic notation mode (Sci) displays the decimal number in scientific notation with an arbitrary number of relevant figures. This mode is entered using (SETUP) (Sci) followed by the quantity of significant figures required to be displayed, such as . If your calculator is set in this mode, the indicator on your display is shown.
• The fixed decimal Mode with fixed decimal places (Fix) displays all decimal numbers in the specified range of decimal locations (unless it is required to make the results fit on the screen). This mode is entered using (SETUP) (Fix) followed by the decimal number required, for example . If your calculator is in this mode the display indicator FIX is displayed.

12.1 Display indicators

The symbols are displayed by the calculator display to indicate the status at present.

Symbol on display	Meaning
	You have pressed the key has been pressed.
	A key was released.
M	A value is stored in the memory of 'M'.
STO	The"STORE" key ( (STO)) has been pressed.
RCL	The RECALL ( ) key has been activated.
	The calculator is programmed to measure angles measured in degrees.
	The calculator is set to measure angles in Radians.
	The calculator is configured to measure angles using Gradians.
FIX	The calculator is set to show the answers according to a set quantity of decimal spaces.
SCI	The calculator is set to give answers in scientific notation . certain numbers of significant figures.
Math	It is important that the calculator has been set to utilize Math mode for both input and output.
STAT	The calculator is in statistics mode.
	There's more info available that can be displayed and it is accessible through the up and down keys.
	The line displayed is longer than the space available on the display. Other areas of the line can be displayed using scrolling left/right cursor keys: and .

12.2 Common operations

To	Key sequence
Turn on
Turn off	(OFF)Note in that calculator will turn off itself in the event that it is not used for more than 6 minutes.
Change the contrast of the display.	(SETUP) () then use and to adjust, and press once you are done.
Restore the factory settings	(CLR) (Setup) (Yes)
Clear out the contents of all memories	(CLR) (Memory) (Yes)
Restore the default settings , then clear any memory	(CLR) (All) (Yes)
Make a calculation unchangeable, or exit menus
Find out the answer
Find a decimal answer using Math mode
Toggle between exact and decimal answer options in Math mode
You can toggle between showing fractions as mixed numbers or fractions that are incorrect in Math mode
Apply the result of this calculation...
... e.g. to find 42 minus the previous result
Write a value into memory with the letter 'M'	(STO) (M)
Clear a value stored in the memory of M	(STO) (M)
Add a value in the memory 'M'
Subtract an amount from that in the memory of 'M'.	(M-)
Display the value stored in the memory of 'M'.	(M)
Make use of the memory with the letter 'M' for calculations...
... e.g. to find 42 minus the value in the 'M' memory	(M)
Set angles which will then be measured as degrees	(SETUP) (Deg)
Measure angles in Radians	(SETUP) (Rad)
Set the answers displayed according to 3 decimal place (To select a different amount of decimal points, replace with the appropriate number)	(SETUP) (Fix)
Set the answers to be displayed in scientific notation , with 3 significant figures (To make use of a different number in significant figures replace the number with the one you want to use.)	(SETUP) (Sci)
You can cancel any settings for display rounding.	(SETUP) (Norm)

The A B, C, D, X, Y memories are used similarly to the M memory, with the exception that they are not able to perform subtracting or adding from' functions.