= 503 × 4 2 = 71 × 30 = 63 × 7 = 8 × 511 ¯ ¯ ¯ 24 ¯ M, 3 ¯ ? 9¯ M 4¯ 8¯ 30 ¯ ¯ 4 ¯M ?ï ¯ :¯ 50 + 4 × 3 5 ï ï M ¯ , 62 = 50 + 12 = 50 + 4 × 3 = 50 + 4 × 3 ¯¯ ?¯ 6 2010 204 ¯ 5 ¯ 120 1 020 10 020 75