2
; .
, . .
, .
(CC) () , . :
;
.
(), . .
2.1. 737.7.
7 , . , , .
, . . .
2.2. : IX, XI, VII. I (). , , . .
. , , p. , : 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, p =10.
: , , . . , , ; 0, 1.
. : 0 1. :
N = bnbn-1... b1b0. b-1b-2...
bj 0, 1.
. : 0, 1, 2, 3, 4, 5, 6, 7. . () ( 1).
. 16 . 0 9, - : 10-A, 11-B, 12-C, 13-D, 14-E, 15-F. . () ( 2.1).
|
|
2.1
- | ||||
p | ||||
0 ÷ 9 | 0, 1 | 0 ÷ 7 | 0÷9, A,B, C, D, E, F | |
A | ||||
B | ||||
C | ||||
D | ||||
E | ||||
F | ||||
( ) . () , . .
() . , . .
, 0 n. , -1 m.
Rp= anan-1... a1a0. a-1 a-2.. a-m
Rp , p;
ai () i - ;
n, (m)
R, p, :
Rp= an*pn +an1*pn1+... +a1* p1 +a0* p0 +a1 *p1+a2*p2+... +am*pm
Rp ,, p;
aj () i- ;
pi () i- .
Rp . ( ) .
2.3. 5147,5610 .
. 6 6.
:
. | |||||||
¾¾¾¾¾ | . | ¾ | |||||
. | -1 | -2 |
3, -2.
5147,56 :
5147,5610 = 5*103 + 1*102 + 4*101 + 7*100 + 5*10-1 + 6*10-2 = 5000 + 100 + 40 + 7 + 0,5 + 0,06.
2.2 .
2.
|
|
2
0 + 0 = 0 0 + 1 = 1 1 + 0 = 1 1 + 1 = 10 | 0 0 = 0 1 - 0 = 1 1 1 = 0 10 - 1 = 1 | 0 0 = 0 0 1 = 0 1 0 = 0 1 1 = 1 |
, . , 1+1 .
2.4.. : X=1101, Y=101.
1 .
2.5.. X=10010 Y=101. X-Y.
, . , ( 1.6 ))
2.6. X Y, X Y.
) X=1001 Y=101
) X=1001 Y=111
.
2.7.. X=1100.011 Y=10.01. X/Y.
1 : ) 12345.034; ) 365; ) -273.1.
2. :
) 51.1510; ) 10110.1012; ) 37.48; ) 7.116.
3. X Y. X+Y X-Y, :
) X=1101001; Y=101111;
) X=101110110; Y=10111001;
) X=100011001; Y=101011.
4. X Y. X*Y X/Y, :
) X=1000011011; Y=1011;
) X=100101.011; Y=110.1;
) X=100000.1101; Y=101.01.
1. ?
2. ?
3. ?
4. ?
1) (A B ). , , .
. , , .
, .
2.1
.
3.1. :
) 10101101.1012 (?)10
1 0 1 0 1 1 0 1. 1 0 1 = 1 * 27 + 0 * 26 + 1 * 25 + 0 * 24 + 1 * 23 + 1 * 22 + 0 * 21 + 1 * 20 + 7 6 5 4 3 2 1 0 -1 -2 -3+ 1 * 2-1 + 0 * 2-2 + 1 * 2-3 = 173. 625 |
10101101.1012 = 173. 62510
) 703.048 (?)10
7 0 3. 0 4 = 7 82+ 0 81+ 3 80+ 0 8-1+ 4 8-2 = 451.0625 2 1 0 -1 -2 |
703.048 = 451.062510
) B2E.416 (?)10
B 2 E. 4 = 11 162 + 2 161+ 14 160+ 4 16-1 =2862.25 2 1 0 -1 |
B2E.416 = 2862.2510