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1、1. 0.6(0.2+0.3) 4.7-(2.6-1.7) 4.3(1.5+0.43) 7.399
2. 9.4210-94.20.9(8.4+0.28)77.899+3.92 (1.25+2.5) 8
3. 7.4(3.74) 51.30.27+10.10.72[(0.3+0.2)0.6]6.399+6.3
4. 3.75[0.2(0.74-0.24)] 7.28+0.94+2.72+0.06 7.84+0.73-0.84
5. 7.38[1.45-(0.4+0.05
2、)] 15.7-4.3-5.7 0.85(4.2-0.4)-0.23
6. 1.6+0.4-1.6+0.478.4(0.7+4.26) 62.82.50.4 1100.1-1.4
7. 12.40.4+5.62 8.54+1.50.252.311.20.5994.3
8. 132-43.7-56.3 12.78-(4.97+2.78) 63.42.50.4 4.914
3、
9. (1.25+0.25)40.8+0.88+0.224.60.35+4.60.6523.4-0.8-13.4-7.2
10. 2.95101-2.956310.1-630.14.299+4.2 3.2101
11. 6.210.1 5.41.8 35(0.352) 3.141.9+31.40.81
12. 7.310.2-1.46 0.921.01 15.613.1-15.63.1 4.9+0.8-4.9+0.8
4、
13. 12.96-(9.6-1.52)1.20.25+1.34 11.16(10-0.7)(300-94.8)0.5
14. (4.8+6.4)840.50.811.0597.50.39-136.7 86.40.240.25
15. 12.6[3.5-(9.8-8.7)]0.648[(0.4+0.5)0.6]15.89+(6.75-5.89)
16. 0.2516.24 4.87.8+780.52 7.85+2.34-0.85+4.6
5、6 4.8100.1
17.35.6-1.8-15.6-7.2 60.9+(13.53+5.37)10.8 5.86+1.81.2+4.14
18. 3.5-3.50.9 25.48-(9.4-0.52) 4.23.5 17.8(1.784)
19.[(10-2.154.6)]8.5 1.252.532 15.20.254 10.4-9.60.35
20.9.24[(2.8+3
6、.2)0.5 ] 27.53.7-7.53.7 0.79199 (2.5-0.25)0.4
21.[(6.35-2.154.6)]0.85 2.311.20.5 600.98 7.2(3.6-1.2)
22.2.5+7.5(8.65-2.25) 28.83.2-19.23.2 57.63.6+57.66.4 1.256.8
23.(7.7+1.54)0.7 720.81+10.4 7.20.128.5
7、 0.450.18300
24.18.10.92+3.93 3.760.25+25.8 94.83+52.4+6.23 5.51.50.12
25.4.078.6+9.125 51.30.27 56.280.67 91.23.8
26. 260.13 10.50.75 0.7560.18 6.210.03
27. -+ 4+8+3
8、 6-1-3 6.5+1-4.8
28. 15-5+4.8 9.28-3-2-1 10-(2+3.9)
29.10-3-2.45+1.6 ++ 1-- -+
30. 4+8+3 6-1-3 ?。?1 -+2
31. -+ +(-) +- 10-(2+3.9)
32. 3?718-1118 67?
9、12+521 512+1.6+712 125 0.02532
33. 38+516?112 27-45-27 1118+415+718?415 37.24-(8.6+7.24-6.6)
34. 3x+7=28 3x-7=26 9x-x=16 24x+x=50
35.
10、
36.
37.
38.
11、
39.
40.
41.
42.
12、
43.
44.
45. 6x-8=4 5x+x=9
13、
46.(45.9-32.7)80.125 3.140.68+31.40.032 5.61.250.82.50.4
47.7.20.2+2.41.4 3366+3334 7.74(2.8-1.3)+1.52.26
48.3.92.7+3.97.3 18-1.80.1250.8 12.79.9+1.27 15.02-6.8-1.02
49.21(9.3-3.7)-5.6 5.411-5.4 2.316+2.323+2.3 9.4
14、3-(6.28-1.57)
50.3.654.7-36.50.37 4657+2386 13.70.25-3.74 2.229.9+6.666.7
51.1010.87-0.9187 10.716.1-15.110.7 0.79199-0.7999 4.8+8.63+5.2+0.37
52.5.93+0.19+2.81 1.76+0.195+3.24 2.35+1.713+0.287+7.65 1.
15、57+0.245+7.43
53.6.02+3.6+1.98 0.134+2.66+0.866 1.27+3.9+0.73+16.1 7.5+4.9-6.5
54.2800 100+789 75〔138(100-54)〕 85(95-144024) 24078(154-115)
55.80400-(4300+87015) 143727+27563 [75-(12+18)]15 (6.8-6.80.55)8.5
16、
56.7.20.8-1.25 864[(27-23)12 (45+38-16)24 500-(240+386)
[64-(87-42)] 15 (845-153)16 12[(49-28)7]
450[(84-48] )12 (58+37)(64-95) 0.12 4.80.124.8
95(64-45) 6.5(4.8-1.24) (284+16)(512
17、-820818)
178-14556+42 812-700(9+3111)
120-36418+35 32.52-(6+9.7283.2)2.5
(3.21.5+2.5)1.6 5.8(3.87-0.13)+4.23.74
(6.8-6.80.55)3.66+7.85-5.37 [(7.1-5.6)0.9-1.15] 2.
18、5
3.07-0.38-1.62 1.29+3.7+2.71+6.3 8-2.45-1.55
3.25+1.79-0.59+1.75 23.4-0.8-13.4-7.2 12564
3.2+0.36+4.8+1.64 1.23+3.4-0.23+6.6 0.2516
12.7-(3.7+0.84) 36.54-1.76-4.54 0.250.734