Storage Units and Binary numbers
Binary Numbers
Units | |||||||||||||||
When calculating storage space for disk drives, it is common to use multiples of 1,000. These are shown in the table below as kilobytes, megabytes etc. Four bits or half a byte is known as a nibble. Complete the following table: | |||||||||||||||
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Binary Number System |
Explain what is meant by data. What is the difference between analogue and digital data? |
Data - the number of symbols or alphanumeric characters in their raw format before processing. Analogue - This is the smooth stream of data thar our senses process on a daily basis, such as a sound wave. Digital - data represented in the the values of 1 and 0 that computer can process |
Number systems - Binary represents data |
What are computers made up of? A computer is made up of billions of switches, each with 2 possible states ON and OFF. Represented as 1 (ON) or 0 (OFF), This is known as a binary What are the two possible states of a binary digit? A binary digit is known as a bit. A bit is the smallest unit of data a computer can use. Eight bits are known as a byte How many bits are in one byte?
What term is used to describe half a byte? How many bytes are contained within 1 megabyte?
How many megabytes in a gigabyte? 1000 Why do computers use binary to represent numbers, text, images, sound and video? Binary is easier for computers to process, and it also takes up less space. Because all data is binary and made up of zeros and ones. |
{Write your answers here in full sentences} |
Binary and denary systems |
Explain the term binary and denary, include base numbers in your answer. 8-bits is used to represent a binary value, what is the lowest and highest number that can be represented? |
Humans tend to use the decimal/denary number system, which counts in multiples of 10s,100s,1000s etc. The denary system has 10 digits; 0,1,2,3,4,5,6,7,8,9 Denary is known as a base 10 number system. The binary number system is a base 2 system. It is based on the number 2. Only 2 values. (1,0) can be used to represent all values. However computers work in binary. Denary numbers must be converted into their binary equivalent before is computer can use them |
128 | 64 | 32 | 16 | 8 | 4 | 2 | 1 |
1 | 1 | 0 | 1 | 1 | 1 | 1 | 0 |
Binary conversion table
Converting from binary to denary |
Using the above table, convert the following binary numbers to denary. First one has been completed for you: |
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Converting from denary to binary |
Convert the following denary numbers to binary. Show all eight bits of the byte. First one has been completed for you: |
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