2.( 1) Mode 40 Average 40.4 Median 40 (2) Median 3. (1) The median is 4000 and the average is 5980. (2) The median is more appropriate. (3) Because 12500 is too large. Page 35: 1. ( 1) 40℃- 10℃ (2) 3.05 1.2
(3) (4) 85% 2. (1) 322,000 (2) 6,300,400 (3)/kloc-0,496,000,000 (4)/kloc-0,303,000.
3.800900 8009001000240001000024,000 4. (1) percentile (2) ten (2) four (3) two million instead of 0.020.002 (4).
Page 36: 1. ( 1) 1, 5, 25 13, 26, 39 (2) 2, 5, 3 1, 5 1; 6、2 1; 5、2 1、
13
3 1、5 1、; 2、6; (3)2 6(4) 3 36 2.( 1)√(2)√(3)×(4)×
3.380 308 830 703 370 87 730 708 307803 870 780 4.( 1)8.025 8.052 8.205 8.502 8.250 (2)80.25 80.52 20.85 20.58 50.82 50.28 (3)20.58
5. > < = > = > 6. (1) 0.640.256 0.1024 (2) 0.5 0.4 0.3 Page 37:1.1000 0.30/.
( 1)438 18.650 1402 196.8 13 16896.8(2) 1.708 0.488 0.389 5.600 4200
Page 38: 1.2/3 hectares, 3/2 hours, 2.432 people, 3.62.5%.
4.77.4 yuan 206 1.925. (1) 357 yuan (2)340 yuan.
Page 39: 1. ( 1)4.39(2)4.8(3)×7.5(4)×4(5)×BC 2.258 405 90 24 25/4 100 3。 ( 1)2857 14 42857 1 57 1428 7 14285 857 142 (2) 100 1 100 1 1 1 00 165 438+0 1 100 1 1 1 1 100