Citizen SR-270X Manuel D'instructions page 13

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Logarithmic and Exponential functions
The calculator can calculate common and natural logarithms, and
exponentiation using [ log ], [ ln ], [log
x
[ e ]. See Example 16~17.
Fraction calculation
Fraction value display is as follows:
Improper Fraction
Math format:
Linear format:
(Note) : Values are automatically displayed in decimal format
whenever the total number of digits of a fractional value
( integer + numerator + denominator + separator marks )
exceeds 10.
In Linear mode, to enter a mixed number, enter the integer part,
press [ d/ e ], enter the numerator, press [ d/ e ], and enter the
denominator ; To enter an improper fraction, enter the numerator,
press [ d/ e ], and enter the denominator. See Example 18.
During a fraction calculation, if the figure is reducible, a figure is
reduced to the lowest terms after pressing the [ = ] key. The initial
default for a fraction result is improper fraction. By pressing [ 2nd ]
[ A b / c d / e ], the displayed value will be converted to the mixed
fraction and vice versa. To convert between a decimal and fractional
result, press [ F D ]. See Example 19.
Calculations containing both fractions and decimals are calculated in
decimal format. See Example 20.
Angle unit conversions
The angle unit (Deg, Rad, Grad) is set by pressing [ 2nd ] [ SET UP ]
from Setup screen and results are displayed according to your
setting.
The relation among the three angle units is:
180 ° = π rad = 200 grad
Angle unit conversions (See Example 21.):
1) Change the default setting (Deg) to the unit you want to convert
to.
2) Enter the value of the unit to convert.
3) Press [ 2nd ] [ DRG ] to display the menu. The units you can
select are ° (degrees), r (radians), g (gradians).
4) Select the unit you are converting from, and press [ = ].
File name : HDB0R100721_English_text_100426.doc
version : 10/04/26
b], [ 2nd ] [ 10
a
Mixed Fraction
12
5
12 」 5
56 」 5 」 12
E – 12
x
], and [ 2nd ]
5
56
12