SCIENTIFIC CALCULATOR

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

Natural logarithms such as , can be analyzed on any calculator using the key. The other function of this key ( ) allows for the calculation of power for . Note that an approximate value for itself can be determined using the key sequence ( ).

Remember that refers to the same thing as ln. Some calculators feature the key instead of .

Activity 20 Calculating natural logarithms and powers of E

Calculate the value of each of the following with your calculator Give each answer to three significant figures.

Find the answer

12 Calculator reference guide

Calculator different modes

General modes

The calculator can be used in many different modes:

  • COMP, which is used to perform general calculations.
  • STAT is used to calculate statistics.
  • TABLE is a tool employed to create tables of numbers.

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

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

Mathematics and mathematics modes

There are two possible ways of displaying math applied to and displayed by the calculator:

  • Math mode, where fractions are entered into the program and displayed in their mathematical forms for instance, and some non-rational numbers appear as surds (such as ) or multiples of (such as ).Math mode is chosen entering 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).

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

You will know you are in Math mode if the word Math is visible on the right hand side of the display at the top calculator display. If it isn't it means you are in Linear mode.

In Math mode you can set an answer to be displayed as a decimal the decimal option, and you can toggle between the mathematical and decimal outputs using .

Fraction display modes

You can set the calculator to ensure that the answers that are heavy on top (such for ) can be displayed as mixed numbers (such as ).

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

Decimal display modes

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

  • Normal 1 (Norm 1) mode uses scientific notation for any value less than 0.01 but greater than -0.01 The mode displays answers to however decimal spaces they contain, subject to the maximum that can fit on the display. This mode is entered using (SETUP) (Norm) .
  • Normal 2 (Norm 2) mode employs scientific notation for any number less than 0.000000001 but larger than -0.000000001 but displays the answers for however many decimal locations they are available up to the maximum that will fit on the display. This mode can be entered by using (SETUP) (Norm) .
  • Scientistic notation mode (Sci) displays all decimal numbers in scientific notation and the number of significant figures. This mode is activated using (SETUP) (Sci) followed by the amount of significant figures needed to be displayed, such as . When you are using your calculator is in this mode, the display indicator SCI appears displayed.
  • Fixed decimal place mode (Fix) displays the decimal values to the given the number of decimal decimal positions (unless it is required for the display to accommodate the results). the display). This mode can be set using (SETUP) (Fix) followed by the decimal number needed, such as . If you are using your calculator is in this mode, the display indicators FIX is shown.

12.1 Display indicators

The symbols are displayed upon the calculator display to indicate the state of operation.

Symbol on display Meaning
A key has been released.
You have pressed the key has been released.
M A value is stored in the memory called 'M'.
STO The key for STORE ( (STO)) was pressed.
RCL The RECALL ( ) key was activated.
The calculator is configured to measure angles in degrees.
The calculator is designed to measure angles in radians.
The calculator is designed to measure angles in gradians.
FIX The calculator will display results to a predetermined number of decimal places.
SCI The calculator will display results in scientific notation and a fixed number of significant figures.
Math It is important that the calculator is set to use Math mode to entry and displays.
STAT The calculator is in the statistics mode.
There's more information to be found than can be displayed, and this can be accessed by pressing the up/down keys.
The line shown is larger than what is possible to fit on the display. Other parts of the line are displayed by scrolling with the left and right cursor keys or .

12.2 Common operations

To Key sequence
Turn on
Turn off (OFF)Note this calculator will automatically shut off after 6 minutes.
Set the display's contrast. (SETUP) () then use and adjust, then press when finished.
Restore factory settings (CLR) (Setup) (Yes)
Clean the contents of all memories (CLR) (Memory) (Yes)
Restore the default settings and clear all of the memories (CLR) (All) (Yes)
Make a calculation unchangeable, or get rid of menus
Find an answer
Get a decimal solution in Math mode
Switch between decimal and exact results in Math mode
Toggle between displaying fractions as improper fractions or mixed numbers in Math mode
Utilize the results of the previous calculation...
... e.g. to find 42 minus the previous result.
Write a value into Memory 'M' (STO) (M)
Clear the value stored in the memory of M (STO) (M)
Add a value to that in the memory 'M'
Subtract the value of in memory 'M' (M-)
Display the value stored in the memory 'M'. (M)
Utilize the number in the memory "M" in calculations...
... e.g. to find 42 times the value in the 'M' memory (M)
Set angles that will be measured using degrees (SETUP) (Deg)
Be sure to measure angles measured in Radians (SETUP) (Rad)
Set answers to be displayed in 3 decimal places (To utilize a different number of decimal place, replace with that number) (SETUP) (Fix)
Set answers to be displayed in scientific notation , with three significant figures (To use a different number of important figures replace this number) (SETUP) (Sci)
Remove any rounding settings that affect display. (SETUP) (Norm)

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


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