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OCR GCSE Computer Science
1.2 Memory & Storage
Adding Binary Numbers
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What is the result of adding two '1' digits in binary addition?
0 (carry the 1)
In binary addition, what does 'carrying the 1' mean?
Transferring a 1 to the next left column
What is the fundamental rule for adding '0' and '1' in binary?
0 + 1 = 1
What is the result of adding '1 and '1' and '1' in binary
1 (carry the 1)
Add the binary numbers 1 and 0.
1
What is the sum of 1 and 1 in binary?
10
Add the 4-bit binary numbers 0101 and 0011.
1000
What is the result of adding 4-bit binary numbers 1100 and 1001?
10101
Compute the sum of 4-bit binary numbers 1111 and 0001.
10000
Add the 8-bit binary numbers 11001001 and 00111001.
100000010
What is the sum of 8-bit binary numbers 10101010 and 01010101?
11111111
What is an 'overflow' in binary addition?
When the sum exceeds the capacity of the number of bits used, requiring an additional bit
Add the 8-bit binary numbers 11110000 and 01110000 and identify if there's an overflow.
11100000