( http://vestikinc.narod.ru/AB/index.htm)
, , , , , . (1-20), (100 - 1020) (/, .. /). , , , , . ( 1020) , (, , , , - - "93 " - "Quatre-vingts-treize" - " "). , , ( ) .
, . .
, :
I -
V -
X -
L -
C -
D -
M -
, , :
MDCLXVI = 1000+500+100+50+10+5+1=1666
, :
MCDXLIV = 1000-100+500-10+50-1+5=1444
, , XIX XVIIII, I .
, . , ( ) . , : , , .., , .
, , :
p - , Ap - A, n ak, k =0, , n-1. A Ap= an-1an-2...a1a0, ak < p.
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:
Ap = an-1pn-1+an-2pn-2 +... + a1p1+a0p0, [1]
a - , n - .
, : , , .
[1] :
1254698357 = 1109+2108+5107+4106+6105+9104+8103+3102+5101+7100
, , , , ( ), , ( ). , ( ̻, , .), , TTL ( Transistor-Transistor Logic - ) CMOS (Complementary Metal-Oxide Semiconductor, ) . TTL , CMOS , .
+5 GND ( GrouND - ). TTL - , (, ) . , 0,36-0,5 (" ") 2,42,7 (" "). 1,3-1,4 . , . () TTL - .
, , , : - . , . , {0, 1}, .. p(2) = 2. ( . binary digit). , 0 - (LOW signal), 1 - (HIGH signal).
[1], n - :
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A2 = an-12n-1+an-22n-2 +... + a121+a020, [2]
,
1011001 = (126)+(025)+(124)+(123)+(022)+(021)+(120) =64+16+8+1 = 8910