Can someone help me to calculate decimal, binary and hexadecimal?

Question

i need to know how to convert between all three... i understand how they are derived, and what they are, but need to convert them on the fly.. explanations or easy to understand websites would be appreciated.

Answer 1

Yes, YOU can help you!!

Open your calculator and choose View --> Scientific.

On the right near the top you have Hex, Dec, Oct and Bin radio buttons.

If you wanted the binary value of decimal value 236, you do this:

Make sure that Dec is selected.

Type 236 into the value box.

Click the Bin radio button.

The result is shown  in the value box as 11101100.

So there you are!  :-)

Answer 2

Here's what I did to memorize them.

For binary: Memorize to the 11th digit (1024).  Rarely you will ever be faced with anything greater than that and it's still in binary.

For hex: If it's in Binary then take 4 at a time.  It works all the time, so it's easier to go straight from binary to hex.

Example: A5 = 1010 (10) 0101 (5).  Put them together: 10100101

For decimal: That's easy.  It's just having the binary values memorized.  If you need to figure it out in HEX then just do the 4 rule above.

When I was going through school (2004) all the professors taught us to get everything down to binary.  You can convert to Hex, oct, whatever easier when it's all down to that.

Take care, best of luck,

Chad

EDIT: LS, imagine you are sitting in class.  You don't have time to run to a computer and get the calculator up.  I believe the poster was looking for shortcuts so they can do better on the tests that are sure to come their way if they are in the field.