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Practical lesson 2 Representation of data in computer systems. Bits and
Содержание
- 1. Practical lesson 2 Representation of data in computer systems. Bits and
- 2. Practical work1.Compete these discription with the correct
- 3. Practical work2. Match prefixes in the box to these numbers
- 4. Practical work3. Work with binary systemsBinary
- 5. Examples:101012 = 10101B = 1×24+0×23+1×22+0×21+1×20 = 16+4+1= 21101112 = 10111B = 1×24+0×23+1×22+1×21+1×20 = 16+4+2+1= 231000112 = 100011B = 1×25+0×24+0×23+0×22+1×21+1×20=32+2+1= 35
- 6. Octal Numeral System - Base-8Octal numbers uses
- 7. Decimal Numeral System - Base-10Decimal numbers uses
- 8. Hexadecimal Numeral System - Base-16Hex numbers uses
- 9. Numeral systems conversion table
- 10. Слайд 10
- 11. Скачать презентанцию
Practical work1.Compete these discription with the correct unit of memoryA ………………. is about one trillion bytes – about as much text as the books and magazines in huge library.A ………………. is
Слайды и текст этой презентации
Слайд 2Practical work1.Compete these discription with the correct unit of memory
A
………………. is about one trillion bytes – about as much
text as the books and magazines in huge library.A ………………. is about one million bytes – about as much text as a 300-page novel.
A ………………. is about one thousand bytes – equivalent to one sheet of A4.
A ………………. is about one billion bytes – about as much text as a 1 000 books.
A …………….can store a single character, such as the letter h or number 7.
Answer key: 1 terabyte, 2 megabyte, 3 kilobyte 4 gigabyte, 5 byte
Слайд 4
Practical work3. Work with binary systems
Binary Numeral System -
Base-2
Binary numbers uses only 0 and 1 digits.
B denotes binary
prefix.
Слайд 5Examples:
101012 = 10101B = 1×24+0×23+1×22+0×21+1×20 = 16+4+1= 21
101112 = 10111B = 1×24+0×23+1×22+1×21+1×20 = 16+4+2+1=
23
1000112 = 100011B = 1×25+0×24+0×23+0×22+1×21+1×20=32+2+1= 35
Слайд 6Octal Numeral System - Base-8
Octal numbers uses digits from 0..7.
Examples:
278 =
2×81+7×80 = 16+7 = 23
308 = 3×81+0×80 = 24
43078 = 4×83+3×82+0×81+7×80= 2247
Слайд 7Decimal Numeral System - Base-10
Decimal numbers uses digits from 0..9.
These
are the regular numbers that we use.
Example:
253810 = 2×103+5×102+3×101+8×100
Слайд 8Hexadecimal Numeral System - Base-16
Hex numbers uses digits from 0..9
and A..F.
H denotes hex prefix.
Examples:
2816 = 28H = 2×161+8×160 = 40
2F16 = 2FH
= 2×161+15×160 = 47BC1216 = BC12H = 11×163+12×162+1×161+2×160= 48146
