Can any one give me tips on Binary calculations?

Question

Hi i have a binary calculations exam this week and i was wondering if any one had a ny tips i can write out the binary table but i find adding up the numbers hard. links to sites would also help and be very appreciated . Thankyou

Answer 1

Binary to Decimal Converter http://www.learnbinary.com/Binary2Dec.html
notes on Binary to Decimal Conversion
http://www.studdard.com/tutorial/base/binary-cvt.html
Notes on Decimal to Binary Conversion
http://www.goshen.edu/compsci/mis200/decbinary.htm

Answer 2

Perhaps it would help to count on your fingertips:
http://www.intuitor.com/counting/

Adding numbers shouldn't be too difficult, just add like normal adding two numbers at a time. However there are some tricks in things like multiplication and division. For example, to multiply by 2 just move all the bits to the left one. The same goes with any power of two. So, to multiply by 4 shift left twice, to multiply by 8 shift left 3 times.

Answer 3

Just like in regular math when it comes to addition ect... stack up your numbers vertically making sure to line up the digits.

10011011 + 10111 =

rewrite as
10011011
00010111
--------------


Since the electrical circuits of computers are designed to perform addition take a look at the adder circuits (see link for added and half adder)
The truth tables explain how to add two bits (bit A, bit B) in there various combinations to obtain the Sum and Carry bits.

Answer 4

Each binary digit is twice the value of the preceeding one.

Answer 5

1+1=write 0
cary 1


1+1+1=write 1
cary 1

1+1+1+1=write 0
cary 2


that is all

Answer 6

I always converted it to base 10...then back to binary :P