How can I avoid making arithmetic and petty calculation errors while performing manual arithmetic?
The problem arises whenever I am engrossed in problem solving. I make mistakes as silly as 3 times 3 is 6!! The mistakes range from actual wrong values to faulty interpretations (mis-read the values from the working space). Although the scourge of silly errors haunts me in all cases (missing important points in the question, etc), I seem to make most mistakes in arithmetic calculations. Haste could be one of the factors, but I seldom have time due to very lengthy papers. Hence time is not the luxury I can afford. How can I minimize general petty errors which arise partly due to haste and partly due to something I don't know?