zhi_hong
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« on: April 17, 2008, 03:25:45 PM » |
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how do u solve binary subtraction 1000.012 - 111.112 without converting to other bases?
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« on: April 17, 2008, 03:25:45 PM » |
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'yus
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« Reply #1 on: April 17, 2008, 04:13:26 PM » |
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... without converting to other bases?
pwede rin yung direct subtaction.. pero mas madali pa rin kung iko-convert muna sa decimal, para ma-verify na rin.. and according to MathCAD:   |
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zer0w1ng
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« Reply #2 on: April 17, 2008, 04:19:32 PM » |
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It is done this way: 1 0 0 0. 0 1
- 1 1 1. 1 1
-------------------
0
borrow one from left, like normal subtraction
0 1 1 1. 10 1
- 1 1 1. 1 1
-------------------
0 0 0. 1 0
As you see, this works like long-hand subtraction. Just shift the borrow from right to left. |
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rdpzycho
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« Reply #3 on: April 17, 2008, 09:38:22 PM » |
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too bad bawal ang decimal point sa calculator ko... nung college pag quiz kailangan direct binary ang solution mo pero I do the decimal verification mentally... |
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'yus
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« Reply #4 on: April 17, 2008, 09:50:03 PM » |
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dati, parang may nagturo samin kung pa'no mag-compute sa calculator kahit yung radix point, di ko lang maalala kung pa'no na..  |
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zer0w1ng
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« Reply #5 on: April 18, 2008, 07:48:33 AM » |
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Radix point is just for alignment during computation.
Just align both radix points of operands and do the operation ignoring the point and adding zeros to the right if it is shorter than the other operand.
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« Reply #6 on: April 18, 2008, 08:22:56 PM » |
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1000.01
- 111.11
-----------
1010.10
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zer0w1ng
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« Reply #7 on: April 19, 2008, 08:35:10 AM » |
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1000.01
- 111.11
-----------
1010.10
This is incorrect. The second digit from the right should do a borrow because it is 0 - 1. See my post above showing the borrow. |
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« Reply #8 on: April 19, 2008, 09:07:39 AM » |
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1000.01
- 111.11
-----------
1010.10
my bad.. |
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zer0w1ng
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« Reply #9 on: April 19, 2008, 09:24:37 AM » |
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Don't worry.  It's all part of learning. I too commit MANY mistakes and learn from it. |
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zhi_hong
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« Reply #10 on: April 25, 2008, 01:00:10 PM » |
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pano naman po iconvert directly from gray to binary? i can make a table pero ubos ata oras ko kung ginawa ko un...
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rdpzycho
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« Reply #11 on: April 25, 2008, 02:09:37 PM » |
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hindi ko na maalala ang Gray Code. ang naaalala ko lang merong techniques to convert long strings to binary, I think it's XOR. may mga quiz kami na mahahabang strings ng Gray Code ang pinapadecode.
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synchronous
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« Reply #12 on: September 27, 2008, 07:41:35 AM » |
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use 1's or 2nd complement po try mo
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gagraduate din ako, hindi ko lang alam kung kelan
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bLacK_aNgeL
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« Reply #13 on: October 07, 2008, 02:01:11 PM » |
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use 1's or 2nd complement po try mo
@synchronous ganyan po gamit namin s logic pang solve kasi bawal calculator.. hehe..  icomplement muna tapos addition n un.. mas madali un.. hehe |
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engineerwafu
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« Reply #14 on: December 21, 2009, 11:57:47 AM » |
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use xor operation. ginagamit din ang xor for subtraction.
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January 12, 2010, 10:28:30 AM
