**What is the unavoidable problem with 2's complement arithmetic?** The unavoidable problem with 2's complement arithmetic is that *it is impossible to negate the most negative number and get its positive value.* **How do you convert a number into its 2's complement form?** You convert a number into its 2's complement form by *converting it into its 1's complement form and adding 1 to the LSB using a ripple carry adder.*