Seiko Rotary Slide Rule Manual - Page 10
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C. Rule-of-three calculation ._.c [Problem] 30/10 = ?/40 LcJ..i [Solution] (1) Bring 30 on the bezel ruler and10 on the dial ruler in line. (2) Read the number on the bezel ruler scale corresponding to 40 on the dial ruler scale. The number is 12 (= 1.2 x 10'). (3) Calculate the number of digits following the formula in "Hint for calculation of the number of digits". [Answer] 120 -o A - (2) B - (1)C - (2) to_ A-(1) B - (2) C-(1) 10
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C.
Rule
-of
-three
calculation
_c
..
[Problem]
30/10
=
?/40
LJ..i
c
[Solution]
(1)
Bring
30
on
the
bezel
ruler
and10
on
the
dial
ruler
in
line.
(2)
Read
the
number
on
the
bezel
ruler
scale
corresponding
to
40
on
the
dial
ruler
scale.
The
number
is
12
(=
1.2
x
10').
(3)
Calculate
the
number
of
digits
following
the
formula
in
"Hint
for
calculation
of
the
number
of
digits".
[Answer]
120
to_
A
-
(2)
B
-
(1)
-
C
-
(2)
10
-o
A-(1)
B
-
(2)
C-(1)