# 24 - Unsigned Binary Arithmetic

1. ________________ binary numbers are encoded to include a positive or negative sign.

256 bit

signed

unsigned

sequenced

2. Unsigned binary numbers ______ have a positive or negative sign so are useful for positive whole numbers only.

always

do

may have

do NOT

3. The advantage of using unsigned binary numbers is that _____________

they are easier to follow and understand

they can be used to store larger numbers than using signed integers

they are easier to hard code into the CPU

they can be used to store very small numbers

4. An unsigned binary number has a minimum of _____ and a maximum vakue of 2n-1, where n is the number of bits available

zero

one

three

two

5. For unsigned binary of eight bits, the maximum value is ___________

256

8

128

255

6. Binary numbers can be added using the same techniques used to add denary numbers.

TRUE

FALSE

7. Binary numbers can NOT be multiplied using the same techniques used to multiply denary numbers.

TRUE

FALSE

8. The only difficulty adding unsigned numbers occurs when you add numbers that are too large. Consider 13+5. What happens?

None of the above

The result is a very large number that deletes itself

The result is a 5 bit number. So the carry bit from adding the two most significant bits represents a results that overflows

The result is a 10 bit number. An extra two bits are required

9. Multiplication is different than addition in that multiplication of an n bit number by an m bit number results in an ___________ bit number

n-m

n+0

n+m

m+m

10. What is the result (in binary) of multiplying 0011011 by 101?

1110011

None of the above

This is not possible as the 101 is not the same size as the first number

10000111