design a combinational logic circuit that can add, subtract, and multiply four-bit inputs?
156384
That's a tall order.  If I had a spare 18 hrs I'd love to, however...\n\nThere's a chip that does it.  Its called an Arithmetic Logic Unit (ALU).  Here's some suggestions:\nhttp://www.xs4all.nl/~ganswijk/chipdir/f/alu.htm\n\nNo offense, but its a ton of work, with no assurance I'll get my 10 points.
1116225
simply multiply it with 0.4
383355
I would suggest, if you can still find some, seven segment hexadecimal driver IC's.  They will convert discrete logic bits into the necessary outputs for a seven segment display.\n\nThe chip has unfortunately been discontinued and are a little fun to find now.  You can build up a substitute using logic gates or a FPGA (if you have access to those and the related equipment).\n\nThis site might be helpful...
870052
Full example and circuit diagram on http://www.padre.ca/house/multiplier_example_web.pdf
167194
Look at each segment in the display and determine for which numbers it should be on (logic 1), and which it should be off (logic 0). \n\nMake a truth table for all 4 input lines for each segment.\n\nCreate an expression for each segment using you favourite technique, such as Karnaugh maps.\n\nChange the expression to only use nand gates.\n\nDo happy dance, cuz you're done.
42408
Something that calculates numbers in rapid succession.
751280
multiplication\n\n\nDoug
518698
use the inputs i0 - i3 as input and of the 3 selector lines make the last one (s2) 0.\n\nThe possible value will be \n\ns2 s1 s0 out\n0  0  0 - i0\n0  0  1 - i1\n0  1  0 - i2\n0  1  1 - i3\n\nenjoy :)
855288
Do a 'Find on this page' search for "Booth" at this link\nhttp://www.csee.umbc.edu/help/VHDL/samples/samples.shtml\n\nHope that's what you are looking for.\n///
525953
X = 24/Y  Just start plugging in Y and getting X, there are lots of possibilities, unless you restrict it to just whole numbers.
650616
These three sequntal clock wise numbers \n2+3+4 --> 9+4 --> 1 (adding the last no.(4)\nBut not works for all
428865
order of operation - parenthesis, power, multi/divide, and add/subtract
975105
Computers are based in transistors, which are electronic devices that can hold only two states: let electric current pass, or stop the current, and most importantly, we can controls these states at will using small electrical currents.\n\nTo one of these states we have assigned a 0 and to the other a 1.\n\nNow, with 0s and 1s you can represent numbers, any number, if you stick to a set of rules.\n\nFor example, if you agree that digits have different values depending on their position, then you can represent any integer number:\n\n0: 0\n1: 1\n2: 10  (the first before last position is multiplied by 2)\n3: 11\n4: 100 (the second before last position digit has a value multiplied by 4).\n5: 101\n6: 110\n7: 111\n\nand so on.\n\nOnce you have a high enough number of numbers in this odd binary language (lets say 256) then you could decide that each digit represents a mathematical operation of some kind, for example:\n\n0 could be an addition.\n1 could be a substraction\n\nand do on.\n\nSo in synthesis you have operations described with 1s and 0s and you can also represent numbers with 1s and 0s. So you have the rudiments of a language you can use, using the examples above, you could say:\n\n0001   \n0000\n0010\n\nwhich could mean 1+2 (using a convention where the second group of digits represents an operation, in this case addition as sugested previously)\n\nall using only 0s and 1s.\n\nYou can extend these principles as much as you want, by doing do you would be creating a computer language.\n\nNow, how does the computer interpret this?\n\nWith  transistors you can also create electronic circuits that behave like small logical machines.\n\nThese logical machines (called logical gates) can be put together in order to perform arithmethic or logical operations.\n\nSo if you feed the series of 0s and 1s of your computer program  to a different circuit behaving like logical/ arithmetic machine (and this is done prety much by wiring the cables as needed), you have the principle of a computer system which is reading a computer program with complex meanings.
139403
in decimal its 2\nin binary its  0\nin other like octal hexa etc its 2\nin logical or its 1\nnow wat do u want????
246250
A bistable multivibrator is a fancy word for a flip flop.\n\nSo there are several answers possible here. The easiest is to make the 4 transistors into two 2-input NOR or NAND gates and cross couple them (see below). Of course, that assumes by transistor you mean bipolar and not FET, but the ideas are the same either way.
361144
4 bits is 0011 + 0100\n4 bits is known as nibble\n4 bits is always set to 0110\n4 bits is d or f
840708
Remove the trailing zeroes, do the multiplication, and add the removed zeroes to the product.\nFor example,\n530*47000\n=53*47 (add 4 zeroes later)\n=24910000\n=24,910,000