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N = an an-1... a1 a0, a-1 a-2... -m () (1)
N ; ai () ; p ; n, m (n) (m) .
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N = an · pn+an-1 · pn-1+... +a0 · p0+a-1 · p-1+a-2 · p-2+...+-m · p-m. (2)
(2) . 123,45:
2 1 0 -1 -2
123,45 (10) = 1·102+2·101+3·100+4·10-1+5·10-2 = 100+20+3+0,4+0,05.
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1
( 10) | ( 2) | ( 8) | () | ( 16) | () | |
I | ||||||
II | ||||||
III | ||||||
IV | ||||||
V | ||||||
VI | ||||||
VII | ||||||
VIII | 001 000 | |||||
IX | 001 001 | |||||
X | 001 010 | A | ||||
XI | 001 011 | B | ||||
XII | 001 100 | C | ||||
XIII | 001 101 | D | ||||
XIV | 001 110 | E | ||||
XV | 001 111 | F | ||||
XVI | 010 000 | 0001 0000 | ||||
XVII | 010 001 | 0001 0001 |
.
16 . 0 9, - : 10-A, 11-B, 12-C, 13-D, 14-E, 15-F. . (, ) (. 1).
(2) , . .
.
) 10101101,101(2)
10101101,101(2) = 1·27 + 0·26 + 1·25 + 0·24 + 1·23 + 1·22 + 0·21 + 1·20 + 1·2-1 + + 0·2-2 + 1·2-3 = 173,625(10)
) 703,04(8)
703,04(8) = 7·82 + 0·81 + 3·80+ 0·8-1 + 4·8-2 = 451,0625(10)
) B2E,4(16)
B2E,4(16) = 11·162 + 2·161 + 14·160 + 4·16-1 = 2862,25(10)
, , , , . , .
.
) 181(10)
_181 | ||
_22 | ||
: 181(10) = 265(8)
) 622(10)
_622 | ||
_38 | ||
_142 | ||
6 | ||
|
|
: 622(10) = 26E(16)
. , . . , .
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0,3125(10)
0, 3125 | ´ | ||
´ | |||
: 0,3125(10) = 0,24(8)
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0,65(10) 6 .
0, 65 | ´ | ||
´ | |||
´ | |||
´ | |||
´ | |||
´ | |||
´ | |||
... |
: 0,65(10) ≈ 0,101001 (2)
.
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23,125(10)
1) :
_ | |||||
_11 | |||||
_5 | |||||
_2 | |||||
2) :
0, 125 | ´ | ||
0 | ´ | ||
´ | |||
: 0,125(10) = 0,001(2); 23(10) = 101112.
: 23,125(10) = 10111,001(2).
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) 305,4(8)
3 | 0 | 5 | , | 4 | (8) | = 11000101,1(2) |
) 7B2,E(16)
7 | 2 | , | (16) | = 11110110010,111(2) | ||
() : , () , . () () (. 1).
.
) 1101111001,1101(2)
001 | 101 | 111 | 001 | , | 110 | 100 | = 1571,64(8) |
) 11111111011,100111(2)
0111 | 1111 | 1011 | , | 1001 | 1100 | = 7FB,9C(16) |
F | B |
.
.
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175,24(8)
1 | 7 | 5 | , | 2 | 4 | (8) | = 1111101,0101(2) = 0111 1101, 0101 (2) = 7D,5(16) |
7 D 5 |
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