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# How to add Binary watch

1. I know how to add easy binary but when you have FOUR 1's in a column of addition... What do you do? Can't seem to find a solution! Help please!
e.g.
01101101
00100111
00101101
2. (Original post by Someboady)
I know how to add easy binary but when you have FOUR 1's in a column of addition... What do you do? Can't seem to find a solution! Help please!
e.g.
01101101
00100111
00101101
well you can do A+B+C in one go (with a lot of carry digits to handle)

or do (A+B) and then add C to the result... which is IMO more manageable and less error prone.
3. (Original post by Joinedup)
well you can do A+B+C in one go (with a lot of carry digits to handle)

or do (A+B) and then add C to the result... which is IMO more manageable and less error prone.
Ah i didnt think of that... if I tried the first method, how would I add the four ones in that column?
4. (Original post by Someboady)
I know how to add easy binary but when you have FOUR 1's in a column of addition... What do you do? Can't seem to find a solution! Help please!
e.g.
01101101
00100111
00101101
Just separate the numbers, If you know how to add 2 number you'll be fine.

01101101+
00100111 then just add 00101101 to the product.
5. (Original post by Stephen Kinsey)
Just separate the numbers, If you know how to add 2 number you'll be fine.

01101101+
00100111 then just add 00101101 to the product.
Okay, but just out of curiosity, what would you do if you had to add all three together and you had 4 1's in a column?
6. (Original post by Someboady)
Okay, but just out of curiosity, what would you do if you had to add all three together and you had 4 1's in a column?
Well it would loook like this

0001
0001 +
0001
0001
---------
0100

So really just apply that to whatever situation you came across. If you had to extend it by a bit then you would just do so.

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