Subtraction using 8-bit binary 1's complement

[Duderonimous]

Homework Statement

Perform the indicated subtraction using 8-bit binary in 1's complement:

(22-59)₁₀

(-11-64)₁₀

Homework Equations

i. Convert the numbers from decimal to binary
ii. Take the ones complement of binary representation of any negative numbers
iii. Add the two numbers together add 1 if there is a carryout. Leave as is if no carry out.

The Attempt at a Solution

(+22)₁₀ →→ (0001 0110)₂ →→ (0001 0110)₂
+(-59)₁₀ → +1'sC(0011 1011)₂ → +(1100 0100)₂
Answer: (1101 1010)₂

(-11) →→1'sC(0000 1011)→1111 0100
+(-64) →+1'sC(0100 0000) →+1011 1111
Answer: 1011 0100

Is this correct? Thanks. I just get the positive value by taking the 1's Comp of my answer right? I kind of figured it out as I wrote this. But if someone can confirm that would be nice thanks.

 

[phinds]

I only checked the first one and it looks fine.

 

[Duderonimous]

Thanks