SCIENTIFIC CALCULATOR

11 Logarithms that are natural and powers of E in your calculator

Natural logarithms, for example could be measured using any calculator using keys. For example, the key. Keys have two functions. key ( ) permits the calculation of powers in the form of . Be aware that an approximate value for its own value can be determined using the key sequence ( ).

Be aware that is the same thing as. Certain calculators come with the key instead of .

20. Calculating natural logarithms and powers of e

Calculate the value of each of these with your calculator and then give the answers to 3 important figures.

Get the answer

12 Calculator reference guide

Calculator options

General ways

The calculator is able to function in several different modes:

  • COMP is a term used to do general calculations.
  • STAT, which is used to calculate statistics.
  • TABLE is a tool used for generating tables of numbers.

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

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

Mathematics and mathematics modes

There are two different ways in which mathematics can be input into and displayed on the calculator:

  • Math mode, where fractions are entered , and then displayed in their mathematical forms such as - and some irrational numbers appear 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 that can't be expressed in a simple fraction.

You can tell that you're in Math mode when the word Math appears on the right hand side of the uppermost part of your calculator display. If this doesn't appear then you're in Linear mode.

In Math mode you can make the answer to display as a decimal using an option or you can toggle between the mathematical and decimal outputs by .

Fraction display modes

It is possible to configure the calculator so that numbers that are heavy on top (such for ) is shown by way of mixed numbers (such like ).

  • To change the calculator to display mixed numbers, use to enter the keys sequence (SETUP) (ab/c).
  • To set the calculator to display as top heavy fractions, make use of this key sequence (SETUP) (d/c).

Decimal display modes

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

  • Normal 1 (Norm 1) mode uses scientific notation of any number smaller than 0.01 but higher than -0.01, and otherwise displays answers to however decimal places they have, subject to the maximum that can fit on the screen. This mode can be entered by using (SETUP) (Norm) .
  • Normal 2 (Norm 2) mode makes use of scientific notation for any number less than 0.000000001 but larger than -0.000000001 but it still provides answers to whatever decimal places they are up to the maximum that can fit on the display. This mode is controlled by (SETUP) (Norm) .
  • Scientific notation mode (Sci) displays all decimal numbers in scientific notation, using the specified number of important figures. This mode can be entered by using (SETUP) (Sci) followed by the amount of significant figures needed for example . When your calculator is set to this mode the indicator on your display is shown.
  • Fixed decimal place option (Fix) displays all decimal numbers in an appropriate quantity of decimal points (unless you are using scientific notation required to fit the result on the display). This mode is entered using (SETUP) (Fix) followed by the decimal number needed, such as . If you're calculator is set in this mode the display indicators FIX is shown.

12.1 Display indicators

These are symbols that are displayed in the calculator display to show its state of operation.

Symbol on display Meaning
This key has been pressed.
The key was released.
M A value is stored in the memory of 'M'.
STO The key STORE ( (STO)) is held.
RCL The RECAL ( ) key has been hit.
The calculator is set to measure angles in degrees.
The calculator is designed to measure angles in Radians.
The calculator is programmed to measure angles in Gradians.
FIX The calculator is set to display the answers according to a set quantity of decimal spaces.
SCI The calculator is set to give answers in scientific notation , with a a fixed number of significant figures.
Math This calculator should make use of Math mode for data input, and for display.
STAT The calculator is in statistical mode.
There's more information available than can be displayed, and it can be accessed using the up/down cursor keys.
The displayed line is longer than the space available on the display. Other sections of the line can be shown by scrolling the left and right keys for the cursor: And .

12.2 Common operations

To Key sequence
Turn on
Turn off (OFF)Note in that calculator will turn off automatically if not used for about 6 minutes.
Set the display's contrast. (SETUP) () then use and to adjust, and then press when done.
Restore 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)
Cancel a calculation, or leave menus
Get an answer
You can get a decimal result in Math mode
Switch between decimal and exact answer options in Math mode
To toggle between showing fractions in mixed numbers or as improper fractions in Math mode
Apply the result of this calculation...
... e.g. to find 42 times the previous result
Store a value in 'M' memory (STO) (M)
Clear the value stored in the memory of M (STO) (M)
Input a value in the 'M' memory
Subtract a number from that in the memory of 'M'. (M-)
Display the value that is stored in the memory 'M'. (M)
Utilize the value stored in the memory of 'M' to perform calculations...
... e.g. to find 42 minus the memory of 'M'. (M)
Set angles to be measured in degrees (SETUP) (Deg)
Measure angles in radians (SETUP) (Rad)
Set the answer to be displayed according to 3 decimal place (To use a different number of decimal place, replace with that number) (SETUP) (Fix)
Set the answers to be presented in scientific notation and three significant figures (To make use of a different number in significant figures substitute the figure with the appropriate number) (SETUP) (Sci)
Removing any setting for rounding the display (SETUP) (Norm)

The A, B, C, D, and X Y memories are used in the same manner as the memory M, with the exception that they don't have any subtracting or adding from' functions.


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