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1、精品文档4欢迎下载1.直接写出得数。(4分)453+198=10-0.03=3.4X 1 = =100.1+ 0.01 =4X 0.025=13.13十 154.5-0.75 X 4+ 5X4=0.1 包01 =96007.5(7.5 6 又 1/2 )5.4+1 又 2/5=0. 239.7+0.03 =78X9.9+7.82-0.2%=_ 一 一一 374050 6300 + 425.04 X 6.5 - 2.76175x_ + X 17510 1013-E 303，一146415 |L6934X0+ 0.18 =51-,1X 4+ 4X =50.18+ 0.2 =3500-700=0.4
2、X 0.2 =-0.9 =24+ 2/11 =(1)1.8 X (4.7-3.87 +0.9) 又 1/2 X8.5(2)8 又 1/2 X 8.5+1204 +2 =1/2+ 1/3 =2/5+ 7/8 =0.9+ 99X 0.9 =56+37 =80-16 =31.5 +5=121.1 =1.2 X 0.2 =2.87 +0.730 +50=25X 8 =127+38 =8.82 =21/412X1/3 =1-7 + 21M/4 =1.02 0.431 攵5% X25=142-69=0.566.4+ 3?=51.25.4 + 9=0.6X0.6 =+ 0.8 =x 5- =62-4=12m
3、2 X 5X7=5542 + 1358 =0.50.4X0.05 =9.6+ 0.03 =X26X 25 =(1+4)15(-6)(+17)(8)2111 54二10-0.01 =35-5 =18 =1124,1724=2.4+1% =1121X -11x73脱式计算。（10分）(3)9.72 X 1.6-18.305 +7.2-24.6=2）35。0.3758891.5 X 8.4 + 3 X 0.3 + 15 X 10%307336x 一 十一 X 1344134X 0.8 X 2.5 X 12.50.655.97+3.8 X 7/ 214、X(-+ -)561537477 丁 11 +
4、7 丁 11X 14 + 87X65% 65%17.6 X 101 -10.5X16-255000 6720+28 X 10752x7725781+ ( 0.75 + - ) X 1332442 + 14 ( 5039)2.25X4.8 +77.5X 0.481375+ 450+ 18(36X 17-12) +1528 X (201-77) 353、求未知数x。（12分）1550.6x(2.5-0.125) X 0.8+6.24+ 3X 2.5 = 67.5 9 0.640.36 1.8 1/4 +2.2 25%6.25 40T62.5X-18%= 65.630%X= 28021X=一5412
5、0%x+x =44 308 M614874田(10/3 +3/4 -21/8)X1150.6x+ 3X2.5 = 67.53.5 芍/8 5/150.8 X2.7 +7.3 勺5/49.8 寸28 X(1 1/7 )+27/5 4 (x+0.2)=1.2X (- +-)35=67.51)2X4.251+ 4 X44 (x+0.2) = 1.2+ - ) = 67.5 52x+3X 0.9=24.92/3X + 3/4X=3 又 2/53又1/2以=1又1/37.5:x= 24:12 3x -6 =8.25一一 0.6 x4(2-1.75)12(6工-3且2413+11-) 5 12 4x=2 38:x =4.75:1 1/3 x +5/6 x =1.4(2.5 -0.125 ) X 0.8 +6.24品品文档6欢迎下载xX2x+ 15 = 2 812欢迎您的下载，资料仅供参考！致力为企业和个人提供合同协议，策划案计划书，学习资料等等打造全网一站式需求