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# Title: Leibniz-Handschriften zur Mathematik LH 35, 4, 13
# Folio 30v, page id 00068010:0060
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Additionis nota est signum +. ut 2+3, item atb
(id est _5) item a + 3 item a + b.
sens
Eodem modo et ( 1 + . item 1 + 2mase
(seu 4) item 1+ 2 mase 3 seu 1 + 213 (id est 6) item = 13
item a+ L vel a + bc. item a + b
vel a +C
Subtractionis nota est signum -. ut
3-2 (id est 1.) a - 3. a - b.
Eodem modo et 1 -  ( id est 3)
1 - 1 (id est 3 - = seu =) a - 2. item
a - b. item a - b. item a - bc. item ab - cd. item  a - b
ab - cd. item a - b + c  vel
2 - L + L (id est 2 +  id est 1
potest enim eadem quantitas
tam per additionem quam per
subtractionem varie componi.
L
aditio repeti potest variis medis.
certa quadam lege servata ex quibus
additur idem, ut a + as sive bis a, vet Si quantitat compesita alici quantitue Arithmetica, est scientia numerorum
simplicissimus ille est, cum aliquoties
et item a + a +a id t ter a. unde dicitur addenda sit, tunc ascribitur ei signis iisdem certorum, ut 0. item 1. item Z item 3. item 10. item 100
a multiplicari per 2  item per 3.
Possuntossunt etiam alii modi additionis
certa lege repetitae excogitari, ut
servatis, sin subtrahienda sit, tunc quantitas item 3+Z (sive splus 2 id est 5) item
subtratienda sascribitur alte signis ita
mutatis, ut ex + fiat = et contra. ut
a + a+ 1 + a + 2 + a + 3 sive additio ut em A + b + cad idem est quod
horum terminorum. a et a + 1. et qu2 a + b + c - d
et a +3 Sed non est opus peculiarem
operationem pro ipsis excogitari
quemadmodum pro aeditione ejusdem
seu multiplicatione
Omni quantitati cui nullum praefixum
est  signum, intelligitur praefixum signum +
ut a+b, id est + a + b. vel a - b. id est
1
perinde ac si dicerem 0 + a + b, vel etiam
item 0+ a - b. sive nihil plus a minus b.