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1、 12 124.254.253 31 15 53 31251258.8 0.1258.8 0.1250.250.2532 40032 4001251258 825253 32 210102225355 51 1(1(1+2+2) 17.15) 17.158.478.471.53 171.53 173 34 40.75+0.75+ +0.375+0.3758 84 45756463514 44 44 44 44 4(2(21 1) )9 9+99+99+999+999+9999+9999 25 25（37378 8）252532321251255 55 55 55 55 546611753 35
2、 53 31 13 37 74 43131727231313 3(5(55.375)5.375) ( (+ +) )72724545( (+ +0.6)0.6)8 813138 84 48 89 915151218242 23 35 51 1 3.4 3.499993.4 187.73.4 187.71111187.7187.7( () )151511110.6250.6250.5+0.5+ +62.5%62.5%151511118 82 2115277113122 43 4357.12557.1250.50.52.422.42+4.58+4.58143433511949822711253 3
3、1 11 17 71 17 72222+25+2575%-775%-70.750.750.250.2563.563.513136 62.52.5 2 24 4+ +4 44 42 215152 215157 711114 414141919+5+55 519191 14 47 7+ +7 711118978973 38 837.5%+10437.5%+1040.3750.3750.1250.1253 31897994 4+ +1 18 88.25+12.5%8.25+12.5%251625161634x x+ +12x x=2.25=2.252x - 1.6=5.42x - 1.6=5.420%x +20%x +34=4=420 - 15%20 - 15%x = 5x = 534x x 16=18=183 - 2x =3 - 2x =352959113.53.51 11 14 4+1.25+1.252 27 71010+3.8+3.84 45 51 58581 41411888125x x+ +3x x=26=26x - 75%x =x - 75%x =52