Question

1001101-00101

Answer 1

1,001,000‬ from what I understand but im not sure

Answer 2

1,001,101 - 101 = 1,001,000

Answer 3

I have a question. Is this binary (base 2) or are these the actual numbers in base 10? That's really important to know.

Answer 4

I strongly suspect that these numbers are in base 2
However, just like in any other base, usually a number does not start with zero

If you doing any extensive work with this, I suggest you look at
an addition and a multiplication table in base 2. You can then perform the 4 basic operations in base 2 following the same algorithms you use in base 10

or

you could change the numbers to base 10, do the arithmetic, then change back to base 2
1001101₂ = 2^6 + 2^3 + 2^2 + 1 = 77₁₀
00101₂ = 2^2 + 1 = 5

[ 77 - 5 = 72 ]₁₀

72₂ = 64+8
= 2^6 + 0 + 0 + 2^3 + 0 + 0 + 0
= 1001000₂

Notice the answer would be same in both base 2 and base 2, since there would be no "borrowing" in the subtraction