binary help

[drdodirty2002]

hello there fellas I am completley lost right now. We are required to take low level languages here and we just recently started to do binary multiplication and the teacher is an idiot straight up. Anyhow here is the question binary multiplication below

1111 1000=(-8)
x0000 0111=(7)
11111000
11111000
11111000
11001000
alright here is my question when adding this up you have a couple of places where you have to add four ones on top of one another observe

1
1
1
1
+ 1
___
how is this situation handled

[laserlight]

alright here is my question when adding this up you have a couple of places where you have to add four ones on top of one another observe

Observe that
a + b + c = (a + b) + c

[InvariantLoop]

Scroll down to the middle of the page and you will find it.
http://www.swarthmore.edu/NatSci/ech...inaryMath.html