CITIZEN SR-281N User Manual
Page 14
File name : CBM_SR-281N_IB_English_black_v09330.doc
Date: 2009/3/30 Trimmed Size : 140 x 75 mm SCALE 1 : 1
-E13-
Scientific Functional Calculations
Use MAIN ( [ MODE ] 1 ( MAIN ) ) mode for scientific function
calculations.
Logarithms and Antilogarithms
The calculator can calculate common and natural logarithms and
anti-logarithms using [ log ], [ ln ], [ 2nd ] [ 10
x
], and [ 2nd ] [ e
x
].
¾
ln 7 + log 100 = 3.94591014906
DEG
l n 7 + l o g 1 0 0 =
[ ln ] 7 [ + ] [ log ] 100 [=]
3 . 9 4 5 9 1 0 1 4 9 0 6
¾
10
2
+ e
–5
= 100.006737947
DEG
10
^
2 + e
^
– 5 =
[ 2nd ] [ 10
X
] 2 [ + ] [ 2nd ] [ e
X
] 5
[ + / – ] [=]
1 0 0 . 0 0 6 7 3 7 9 4 7
Fraction calculation
Fraction value display is as follow :
5 」12 Display of
12
5
56
∪
5 」12 Display of 56
12
5
(Note): Values are automatically displayed in decimal format whenever
the total number of digits of a fractional values ( integer +
numerator + denominator + separator marks ) exceeds 12.
To enter a mixed number, enter the integer part, press [ a b/c ], enter
the numerator, press [ a b/c ], and enter the denominator ; To enter an
improper fraction, enter the numerator, press [ a b/c ], and enter the
denominator.
¾
21
8
22
7
5
14
3
2
7
=
+
DEG
7
2
3
+
1 4
5
7
7 [ a b/c ] 2 [ a b/c ] 3 [ + ] 14 [ a b/c ]
5 [ a b/c ] 7 [=]
2 2
8
2 1 .
During a fraction calculation, if the figure is reducible, a figure is
reduced to the lowest terms after pressing a function command key
( [ + ], [ – ], [ x ] or [ ] ) or the [=] key. By pressing [ 2nd ] [
d/e ], the
displayed value will be converted to the improper fraction and vice
versa. To convert between a decimal and fractional result, press
[ a b/c ].