2.2 Binary arithmetic and hexadecimal Flashcards
1
Q
What do the following binary additions equal: 0+0 = ? 1+0 or 0+1 = ? 1+1 = ? 1+1+1 = ?
A
0+0 = 0 1+0 = 1 1+1 = 0 carry the 1 1+1+1 = 1 carry the 1
2
Q
What is the biggest number you can represent with 8 bits?
A
255 = 11111111
3
Q
When does an overflow occur when adding 2 binary numbers?
A
When you cannot represent the number in the amount of space because the number is too big
4
Q
Shifting to the left does what to a number?
A
Multiplies it
5
Q
Shifting to the right does what to a number?
A
Divides it
6
Q
How is 10 to 16 represented in hex?
A
10 = A 11 = B 12 = C 13 = D 14 = E 15 = F 16 = 10
7
Q
How would you convert denary to hex?
A
2 ways:
convert denary to binary then binary to hex
divide the denary number by 16 to find how many groups of 16 there are and the remainder and put together
8
Q
Name some uses of hexadecimal.
A
picking colours for a graphic
used in assembly language instructions
