Column minus column operation?

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http://www.unix.com – I have a two files, file A and B, which have 5 columns, and each 5 columns are made up of random numbers, that means, numbers are all different. They have same amount of lines (Both 1000 lines) I hope to do a operation 1) 2nd column of file A - 2nd column of file B 2) 5th column of file A - 3rd column of file B and print them out with file name 'results' with First column: 1st column of file A Second column: result of 1) Third column: result of 2) I've been tried to use cat and awk, but not works. Need any help here~ (HowTos)