Two's Complement (2)

represent strings

represent floating-point numbers

represent positive and negative integers

represent numbers in base 2 (binary)

-32

-128

-64

+32

8

9

10

7

there are two representations for 0

not all arithmetic calculations work correctly

they take up too much memory space

they can represent a smaller range of values than two's complement

0 + 0 = 0

0 + 1 = 1

1 + 1 = 10

1 + 1 + 1 = 11

1 + 1 + 1 + 1 = 111

convert between a signed denary number and two's complement binary

find the range of values that can be represented in two's complement with any number of bits

convert decimal numbers to binary

add and subtract binary numbers