What is an easy way to convert, add and subtract binary and hexadecimal numbers?

i really need someone to dumb it down for me.What is an easy way to convert, add and subtract binary and hexadecimal numbers?
Hexadecimal Number Line:


1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 1a, 1b, 1c, 1d, 1e, 1f, 20





so 9 + 1 = a





a + 2 = c





so you start at the first number and count up the number line by the 2nd number.





So if you start at b and count up the number line 3 places you find e.





So b + 3 = e





and f + 1 = 10





10 + a = 1a








Binary is easy





1


+1


10





1111


+0001


10000





1001


+0010


1011





1011


+0001


1100





get it?What is an easy way to convert, add and subtract binary and hexadecimal numbers?
The EASIEST way to do this is to go into the Microsoft Window ';Start'; icon on the button of the screen and select ';Accessories.'; Under that directory, there should be the free calculator that usually comes with the MS OS. It will be in ';standard'; mode.





Click on ';view'; in the Calculator menu and switch it to ';Scientific.'; Voila! You have an easy way to convert, add, and subtract binary and hex numbers!





If you want to learn how to convert without the calculator, I suggest you search the www for a tutorial on that. This not going to be explained in 3 paragraphs especially if you want to concert binary or hex to decimal and vice versa.
are you not allowed to use a calculator. the one on xp in scientific mode will do this with no probs.
The following URL explains how to convert numbers to binary using a table. You need acrobat reader on your computer to open the file.