优质解答
2.54-45+65 3.24-21+54 4.98-95+54 5.54+88-87 6.54+52-84 7.20+84-87 8.21+77-45 9.54+82-12 10.62+59-45 11.51-54+51 12.87-78+99 13.24+54-51 14.54+84-215 15.87-51+55 16.87-72+91 17.85-58+46 18.62+12-85 19....
2.54-45+65 3.24-21+54 4.98-95+54 5.54+88-87 6.54+52-84 7.20+84-87 8.21+77-45 9.54+82-12 10.62+59-45 11.51-54+51 12.87-78+99 13.24+54-51 14.54+84-215 15.87-51+55 16.87-72+91 17.85-58+46 18.62+12-85 19....