Manual Scientific 491-120080 (page 3 of 40) (English, German, Dutch, French, Spanish)

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Scientic calculator – Instructions for use | 3

Example 1:

Example 2:

Example 3:

Example 4:

Results of calculations which mix fraction and

decimal values are always decimal.

–Decimaal  fraction conversion. Use the

operation shown below to convert calculation

results between decimal values and fraction

values. Note that conversion can take as long as

two seconds to perform.

Example 1: , = d/c

Example 2:



0.5

–Mixed fraction  improper fraction

conversion.

Example 1:



, = d/c

You can use the display setup (Disp) screen to specify

the display format when a fraction calculation result

is greater than 1. To change the fraction display

format, press the key a number of times until

you reach the setup screen shown below.

Display the selection screen: .

Press the number key ( or ) which corresponds

to the setting you want to use.

(ab/c): mixed fraction.

(d/c): improper fraction.

An error occurs if you try to input a mixed fraction

while the d/c display format is selected.

PERCENTAGE CALCULATIONS

Example 1: To calculate 12% of 1500 (180),

= %:

Example 2: To calculate what percentage of 880 is

660, = %:

DEGREES, MINUTES, SECONDS

CALCULATIONS

You can perform sexagesimal calculations using

degrees (hours), minutes, and seconds, and convert

between sexagesimal and decimal values.

Example 1: To convert the decimal value 2.258 to a

sexagesimal value and then back to a decimal value.

Example 2: To perform the following calculation:

12° 34' 56" × 3.45 =

FIX, SCI, NORM, RND

To change the settings for the number of decimal

places, the number of signicant digits, or the

exponential display format, press the key a

number of times until you reach the setup screen

shown below.

Press the number key ( , or ) which

corresponds with the set up item you want to change.

(Fix): number of decimal places.

(Sci): number of signicant digits.

(Norm): exponential display format.

Example 1: 200 ÷ 7 × 14 =

Species three decimal places:

(Fix)

Internal calculation continues using 12 digits.

The following performs the same calculation using the

specied number of decimal places.

Internal rounding, = Rnd

Press (Norm) to clear the

Fix specication.

Example 2: 1 ÷ 3, displaying the result with two

signicant digits (Sci 2).

(Sci)

Press (Norm) to clear the

Fix specication.

MEMORY CALCULATIONS

Use the key to enter the COMP mode when you

want to perform a calculation using memory.

COMP _______________

–Answer memory. Whenever you press after

inputting values or an expression, the calculation

result automatically updates the answer memory

content by storing the result. In addition to ,

answer memory content is also updated with

results whenever you press (%), ,

(%) (M-) or (STO)

followed by a letter (A through F or M, X or Y). You

can recall answer memory content by pressing

. Answer memory can store up to 12 digits

for the mantissa and two digits for the exponent.

Answer memory content is not updated if the

operation performed by any of the above key

operations results in an error.

–Consecutive calculations. You can use the

calculation result which is currently on the display

(and also stored in answer memory) as the rst

value of your next calculation. Note that pressing

an operator key while a result is displayed causes

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Scientific 491-120080 Manual

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