[r+19/100]+[r+20/100]+…+[r+91/100]=546,求[100r][r+19/100]+[r+20/100]+…+[r+91/100]共73项546÷73=7…35所以[r]=7[r+19/100]+[r+20/100]+…+[r+91/100]的后35项为8即[r+56/100]=7,[r+57/100]=8r+56/100<8,r+57/100≥8r<7.44,r≥7.43[100r]=743