1
: , .
. . , 1994
M C M X C I V
:
M = 1000; D = 500; C = 100; L = 50; X = 10; V = 5; I = 1.
, , , .
1000 - 100 + 1000 - 10 + 100 + 1 + 1 + 1
() . .
.
.
83887. :
80000 + 3000 + 800 + 80 + 7.
, , 8, .
, , n+1 m :
an, an-1, an-2,..., a2, a1, a0, b1, b2,...,bk,
ai - i- , bj - j- .
an*n + an-1*pn-1 +...+ a1*p1 + a0*p0 + b1*p-1 + b2*p-2 +...+ bk*p-k,
p - .
,
83887,45 = 8*104 + 3*103 + 8*102 + 8*101 + 7*100 + 4*10-1 + 5*10-2.
, (2, 8 16 c/c). , , .
.
2. , , . 2 / 0 1.
11010,101 = 1*24 + 1*23 + 0*22 + 1*21 + 0*20 + 1*2-1 + 0*2-2 + 1*2-3 =
= 16 + 8 + 2 + 1/2 + 1/8 = 26 5/8 = 26,625 (10 /)
2 / 10 c/c (2 --> 10).
10 --> 2. .
|
|
. 43,37510 = 101011,0112
43 2
42 21 2
1 20 10 2
1 10 5 2
0 4 2 2
1 2 1
0
<--------------
, , . . 101011.
, 5 2. , 1 2. , 0 24, 1 23, 0 22, 1 21 1 20.
:
1*25 + 0*24 + 1*23 + 0*22 + 1*21 + 1*20,
.. 2.
. 10 , .
0, 935 * 10
9, 35 * 10
3, 5 * 10
5, 0
, 9*10-1 ( ) + 3 * 10-2 ( ) + 5 * 10-3 ( ).
10 p, p.
0, 375 * 2
0, 75 * 2
1, 5 * 2
1, 0
, 0,37510 = 0,0112.
. , 0,4
0, 4 * 2
0, 8 * 2
1, 6 * 2
1, 2 * 2
0, 4 * 2
0, 8 * 2
1, 6 * 2
..............
0,310 = 0,011001100110... = 0, (0110)2
, .