Another method of giving an approximated answer is to round off using significant figures. Sometimes, the term 'significant figures' is abbreviated to sig. figs and often it's abbreviated to just ...

The first two significant figures are 5 and 2. As the next digit is 4 the 2 stays as it is. Therefore 5246 rounds to 5200 to 2 significant figures. (Notice that we must put in zeros to keep the ...