Scientific Calculations; Arithmetic Operations; Functions; Random Numbers - LEXIBOOK SC300I User Manual

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[FSE] are pressed, the display mode changes in the sequence:

FIX→SCI→ENG→Floating point system→FIX...

Determination of the Number of Decimal Places

When the FIX, SCI or ENG indicator is displayed, the number of decimal places can be

set to any value between 0 and 9. After setting the number of decimal places, the

display value will be rounded to the corresponding number of digits and displayed. To

specify the number of decimal places, first press

2ndF

is displayed or after clearing the values in the calculator with

appropriate number key to specify the number of decimal places.

Determination of the Angular Unit

In this calculator, the following three angular units can be specified.

Degree (°):

The DEG indicator appears.

Radians (rad):The RAD indicator appears.

Grads (g):

The GRAD indicator appears.

To specify the angular unit, press

. Each time

DRG

unit changes in the sequence: DEG→RAD→GRAD→DEG...

Note: For the examples given in subsequent explanations, make sure that none of the

following symbols or guidance are displayed unless otherwise specified.

FIX, SCI, ENG: see page 12

Check and Correct Equation

You can edit the equation not only while you are entering but also after getting your

answer.

[While entering]

• Press

to move the cursor.

• If you need to delete a number, move the cursor to the number you wish to delete

then press

DEL

The number under the cursor will be deleted.

• If you need to insert a number, move the cursor to the place immediately after where

you wish to insert the number then enter the number.

[After finding the answer]

• Press

[⊂⊃] to go back to the equation to check it right or not.

2ndF

• Edit the equation the same way as while entering.

Substitute Arithmetic Function

If you have a formula and all you have to do is to substitute the numbers, this function

might be handy. It remembers the entered equation as a formula. After finding the first

answer, press

[?] and this function automatically moves the cursor back to the

2ndF

first number of the equation and lets you change the number. After that, you can skip to

the next number by pressing

[?] and so on. At any place, pressing [=] lets you

2ndF

know the answer for the new equation.

For example: A² + B² =

(1) A= 2.5, B= 3.5

(2) A= 2.5, B= 4.5

2.5 [ x² ] [ + ] 3.5 [ x² ] [ = ]

[2ndF] [ ? ]

[2ndF][ ? ]

[DEL] 4 [ = ]

[TAB] when a calculation result

ON/C

. Then press the

If the FIX, SCI, or ENG indicator is displayed, clear the indicator by pressing

[FSE]. (See page 12)

Arithmetic Operations (→ → → → page 8)

Functions (→ → → → page 8)

Before performing function calculations be sure to press

• Before starting calculations, specify the angular unit (See page 18)

is pressed, the angular

DRG

• Chain calculations(The result of the last calculation is used as the first operand.)

Random Number

A pseudo-random number with three significant digits can be generated by pressing

[Random]

2ndF

perform this function in the normal and statistics mode.

• Random number use memory Y. Each random number is generated on the basis of

the value stored in memory Y (pseudo-random number series)

Angular Unit Conversions (→ → → → page 9)

The angular unit can be changed in the following sequence:

degrees→radians→grades→degrees...

Memory Calculations (→ → → → page 8)

This calculator has one independent memory (M), one last answer memory, and two

temporary memories, (X,Y).

Independent memory (M)

(M) memory is available in the normal mode.

[M] :

STO

Clear the independent memory and then stores the displayed value in it.

RCL

[M] or

Recalls the value in the independent memory.

M+

Adds the displayed value to the value stored in the independent memory.

[M-] :

2ndF

Subtracts the displayed value from the value stored in the independent memory.

• Press

memory.

Key Operation

Display

Remark

2.5² + 3.5²=

18.5

(1)

2.5² + 3.5²

2.5² + 4.5²=

26.5

(2)