... 630) = 43 ,57 x 2, 6 x 0 = 0 c, 26 154 51716 45 = 28 154 517)1 15( 45 = 28 154 517 451 5 45 = 28 154 5 28 154 5 = AA = 1 d, 41 455 52 107416, 053 10 32 456 79,0 123 018,0 ... a, 17 ,58 x 43 + 57 x 17 ,58 b, 43 ,57 x 2, 6 x (630 – 3 15 x 2) c, 28 154 51716 45 d, 41 455 52 107416, 053 10 32 456 79,0 123 018,0 e, 9,8 + 8,7 + 7,6 + . +2, 1 – 1 ,2 – 2, 3 – ... nhanh nhất : a, 99 757 98 059 853 99019 95 19 950 17 955 159 60139 651 197099 75 b, 123 4 x 56 78 x (630 – 3 15) : 1996 c, 19 951 991199619 95 39 955 453 19xxxx; d, 19941996100099619 951 996xx;...