1、 2 3.3 5 13 2 9 1 4 5 (5)( 9 ) (6) 737 3999 13 9 13 4 1 3 1 (7) ( )36 (8) 325 4000 125 4 6 4 8 2 (9) 1981 1981 31 29 (10) 99.6 0.2 31 2 19 (11) 32 2 (12) 1764 35 6.6 17 17 3.解方程。 1 1 (1) : x 0.7 : (2) 9.5x 3.1x 172.8 2 7 1 (3) : x 2 : 9 (4) 10(x 1) 3.8 4 1 1 1 4 4.65 2.25 0.95 6 4 5 7 7 4 8 70 70 6.
2、3 0.04 6 6 5 7 6 6 1 79 3 5 20 5 5 2 0.8 0.8 2 14 20% 377 999 4 (2) 11.77 0.36 5.23 11.64 9 9 23 1 1 4 9 5.3 2 23 9 3 1 16 1 2 (6) 396 6399 19 2 19 3 36 (8) 375 2000 25 8 8 4 4 1928 1928 19 17 (10) 29.8 0.25 19 10 19 68 10 (12) 759 15 0.6 29 29 (2) 7x 3.9x 71.3 4 3 x 3 : 10 (4) 2(x 8) 9.3 1 1 7 2 4.
3、35 1.95 0.45 2 2 8 53 53 1.1 0.03 7 7 2 2 9 9 8 39 9 11 8 8 7 8 6 20% 313 98 8 8 (1) 8 8 (2) 11.78 0.32 4.22 11.68 23 4 1 2 0.5 (4) 2.8 8 3.2 10 23 8 5 1 12 1 8 (6) 383 2899 17 8 17 7 5 9 1 84 (8) 75 3000 6 8 8 8 1936 1936 27 19 (10) 25.6 0.5 27 10 10 41 10 (12) 609 15 7.6 x 0.6 : (2) 8.8x 2.5x 138.
4、6 2 4 x 6 : 9 (4) 10(x 9) 2.1 1 2 6 3 4.05 2.65 0.75 4 3 5 5 5 1 1 2 2 6.3 0.02 4 4 4 4 1 1 5 99 5 8 13 6 6 4 3.6 3.6 4 11 90% 307 998 8 (2) 11.03 1.13 7.97 11.87 7 7 11 5 1 0.25 (4) 3.1 9 5.9 8 11 9 3 1 10 1 ) (6) 885 7699 13 2 13 2 13 5 1 12 (8) 75 3000 2 12 4 8 1988 1988 23 (10) 44.1 16 23 64 16
5、(12) 2015 25 0.2 1 8 x 0.2 : (2) 4.5x 1.8x 16.2 3 7 11 (4) 2(x 2) 0.8 2 4.35 1.25 0.75 9 2 2 7 7 5 1 7 7 9.1 0.04 6 6 4 8 1 1 9 29 10 8 8 8 0.2 0.2 2 5 70% 473 999 8 (2) 13.91 0.73 3.09 11.27 23 7 1 2.5 (4) 2.1 7 2.9 4 23 7 1 1 10 1 4 (6) 634 4499 11 4 11 5 12 (8) 175 7000 6 4 2 1904 1904 21 13 (10)
6、 56.9 21 8 25 37 8 (12) 1313 65 1.6 31 31 (2) 8.5x 3.6x 122.5 4 5 x 7 : 9 (4) 0.5(x 6) 5.3 3 8.05 0.15 0.45 7 3 8 1 1 5 1 96 96 9.1 0.02 4 4 4 6 6 6 7 49 8 9 15 7 7 8 0.4 0.4 2 1 80% 383 999 4 (2) 14.05 0.72 4.95 12.28 17 1 1 1.25 (4) 2.4 3 6.6 6 17 3 1 1 16 1 (6) 857 3699 17 8 17 4 11 7 1 96 (8) 37
7、5 6000 10 8 4 1960 1960 11 9 (10) 42 0.125 11 14 12 46 14 (12) 988 95 4 6 1 (2) 6.8x 3.4x 61.2 5 7 8 (4) 0.5(x 5) 8.8 6 1 1 6 7 6.25 2.25 0.65 3 7 5 1 1 6 4 83 83 9.3 0.01 3 3 5 3 1 1 1 4 4 4 3 6 20 50% 154 999 8 (2) 11.58 0.32 7.42 11.68 19 10 1 2.5 (4) 2.7 5 2.3 8 19 5 3 1 14 7 6 (6) 473 1099 17 6 17 8 84 (8) 225 4000 8 4 8 25 17 (10) 88.8 25 10 21 36 10 (12) 1059 15 4.5 19 19 3 1 x 0.4 : (2) 9.3x 1.2x 162 2 3 11 (4) 8(x 7) 9.3 3 5.85 0.15 0.75 2 3 2 1 1 1 1 79 79 7.3 0.04
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