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Addition
and subtraction
cf
numbers consisting
of more than
9,
but
less
than
13
digits
[,i,i,it]tlt':
57
E3)
L)65
7E2
155
E79
6n
rc3-5
289
1i3
2n :::i
?
Stt
r.ip as
na11,v
of
the
iirst
figures
of
thc
nurnber as
thc
sctting
rcgister can
hold (9
irgures).
The two last
figures, thercfore,
havc
to
be
left
or.it.
Depress
the
left
hand
shift key
Q
twice (or
as
lnany
times
as
there
are
remaining figures
in
the
number).
\Iake
a
fors.ard turn.
The product
register
shc*'s
Clear the
settir-rg
register.
Norr-
set
ancl rrake
a
forward turn.
The
up the
two remaining figurcs,
[i2,
product
register
now
shows
thc
complete number
C1e:rr
the
setting register. Set
up thc first
9
figr.rrcs
in
ti-rc
ne
xt
irurnbcr.
Press
the
left
hand shift
kcy
tl
thrcc
tirnes ancl
mal'c
r.r
torr
;rrcl
turn.
Tlle
proclnct register
nclrv
sht-,rvs
Clcar
the setting registcr.
Sct
up
the threc
rcrnaining
figr"rres, 1.63,
and
rutrkc
a
forward turn.
Thc
procluct register
now
sl-iows
thc tetal
sunr
of
tl.rc
trvo
;rclclcel
riiimbcrs
Cle,rr
thc
ta
sctting register again. Scr
Lrp
rhc
first 9
ligurcs
uI
thc
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