# Practice Sheet - Computer Arithmetic

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```					CIS 225 Computer Org. & Architecture
Prof. Rasley
Practice Sheet - Computer Arithmetic

For practice purposes only, this will NOT be collected.
1.     Convert the following from base 2 to base 10: (The radix point is at the right of each
part). After completing that convert base 2 to base 16.

a)      1111010111

b)      1011011

c)      100110111

d)      10001011

e)      11001010

2.     Convert the following from base 10 to base 2:

a)      1020

b)      387
c)     420

d)     35

e)     220

3.   Convert the following from base 16 to base 10:

a)     1AC6C

b)     2CA7

c)     1F4A
4. Convert the following from base 10 to base 16:

a)        457

b)        356

c)        2986

5.      Convert the following from base 16 to base 2:

d)        1A6

e)        CF

f)        FCA6
6.   Compete the following two’s complement subtractions in base 2: (indicate overflow
conditions if they occur)

a)       0010
- 0111

b)       0101
- 0010

c)       1011
- 0010

d)      0101
- 1110

```
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