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1、1.25(8+10)=1.258+1.2510=10+12.5=22.59123-(123+8.8)=9123-123-8.8=9000-8.8=8991.21.248.3+8.31.76=8.3(1.24+1.76)=8.33=24.999991001=9999(1000+1)=99991000+99991=1000899914.86.3-6.36.58.33.7=(14.8-6.5)6.38.33.7=8.36.3+8.33.78.3(6.33.7)=8.310=831.24+0.78+8.76=(1.24+8.76)+0.78=10+0.78=10.78933-157-43=933-(1
2、57+43)=933-200=7334821-998=4821-1000+2=3823I3212525=4812525=(425)(8125)=1001000=1000009048268=(2600+2600+2600+1248)26=260026+260026+260026+1248269=100+100+100+48=3482881 43=(1290+1591) 434=129043+159143=30+373.242.33.75-12.50.42316=3.242.33.75-1.2542.31.6=42.3(3.23.75-1.251.6)=42.3(40.83.75-1.2540.4
3、)=42.3(40.423.75-1.2540.4)=42.3(4x0.4x7.5-1.25x4x0.4)=42.340.4(7.5-1.25)=42.340.46.25=42.3(42.5)=42371.8+181.5-0.50.3=1.8+12-0.15=13.8-0.15=13.656.58+3.58-47=52+28-47=80-47(80-9.8)5分之2-1.32=70.2X2/5-1.32=28.08-1.32=26.7687分之41(3.2-2.95)=84/710.25=84/74=8/72700(506499)900=27007900=18900900=2133.02(14
4、8.490.85)2.5=33.0257.552.5=33.0223.02=10(111)5.1=(11)5.1=05.1=018.1(30.2990.23)1=18.11.71=18.11.7=19.8-18+29+-52+60= 19-3+-2+-1+0+1+2= -3-301+125+301+-75= 50-1+-1/2+3/4+-1/4= -1-7/2+5/6+-0.5+4/5+19/6= 1.25-26.54+-6.14+18.54+6.14= -81.125+-17/5+-1/8+-0.6= -3-98+76+(-87)*2356+(-75)-(7)-(8+4+3)5+21*8/2
5、-6-5968/21-8-11*8+61-2/9-7/9-564.6-(-3/4+1.6-4-3/4)1/2+3+5/6-7/122/3-4-1/4*(-0.4)/1/3+222+(-4)+(-2)+4*3-2*8-8*1/2+8/1/8(2/3+1/2)/(-1/12)*(-12)(-28)/(-6+4)+(-1)2/(-2)+0/7-(-8)*(-2)(1/4-5/6+1/3+2/3)/1/218-6/(-3)*(-2)(5+3/8*8/30/(-2)-3(-84)/2*(-3)/(-6)1/2*(-4/15)/2/3-3x+2y-5x-7y14372727563 75-(12+18)15
6、2160(83-79)18 28084024532513(266250) 85(95144024)58870(105202) 1437272756381432(135278) 37.85-(7.85+6.4) 30156(17.7-7.2)3 (947599)766436(91327623) 192(5438)67(7.1-5.6)0.9-1.152.5 81432(135278)5.42.6(3.7-2.9)+0.62 (947599)7664 60(9.528.9)0.18 2.8810.430.243.5 20(2.441.8)0.40.15 28-(3.4 1.252.4) 0.815
7、.5-(3.21 5.79) (31.8 3.24)5 19464.81.80.9 36.724.259.9 3.416(0.01635) 0.8(106.76)1.2(136+64)(65-34523) (6.8-6.80.55)8.50.12 4.80.124.8 (58+37)(64-95)812-700(9+3111) (3.21.5+2.5)1.685+14(14+20826) 120-36418+35(284+16)(512-820818) 9.721.6-18.30574/71/3(3/5-3/10) (4/5+1/4)7/3+7/1012.780( 13.4156.6 ) 37
8、.812-700(9+3111) (136+64)(65-34523) 3.2(1.5+2.5)1.685+14(14+20826) (58+37)(64-95)(6.8-6.80.55)8.5 (284+16)(512-820818)0.12 4.80.124.8 (3.21.5+2.5)1.6120-36418+35 10.15-10.750.4-5.75.8(3.87-0.13)+4.23.74 347+452-41605232.52-(6+9.7283.2)2.5 87(58+37)(64-95)(7.1-5.6)0.9-1.15 2.5 (3.21.5+2.5)1.65.42.6(3
9、.7-2.9)+0.62 126(12-7.2)-63.26+(1.5+2.5)1.6 (3.21.5+2.5)1.65.8(3.87-0.13)+4.23.7433.02(148.490.85)2.51)23+(-73)(2)(-84)+(-49)(3)7+(-2.04)(4)4.23+(-7.57)(5)(-7/3)+(-7/6)(6)9/4+(-3/2)(7)3.75+(2.25)+5/4(8)-3.75+(+5/4)+(-1.5)(9)(-17/4)+(-10/3)+(+13/3)+(11/3)(10)(-1.8)+(+0.2)+(-1.7)+(0.1)+(+1.8)+(+1.4)(1
10、1)(+1.3)-(+17/7)(12)(-2)-(+2/3)(13)|(-7.2)-(-6.3)+(1.1)|(14)|(-5/4)-(-3/4)|-|1-5/4-|-3/4|)(15)(-2/199)*(-7/6-3/2+8/3)(16)4a)*(-3b)*(5c)*1/61. 3/7 49/9 - 4/32. 8/9 15/36 + 1/273. 12 5/6 2/9 34. 8 5/4 + 1/45. 6 3/8 3/8 66. 4/7 5/9 + 3/7 5/97. 5/2 -( 3/2 + 4/5 )8. 7/8 + ( 1/8 + 1/9 )9. 9 5/6 + 5/610. 3
11、/4 8/9 - 1/30.121.80.9=7.2 (95)0.3=1.02 6.4-=28+4.411. 7 5/49 + 3/1412. 6 ( 1/2 + 2/3 )13. 8 4/5 + 8 11/514. 31 5/6 5/615. 9/7 - ( 2/7 10/21 )16. 5/9 18 14 2/717. 4/5 25/16 + 2/3 3/418. 14 8/7 5/6 12/1519. 17/32 3/4 9/2420. 3 2/9 + 1/321. 5/7 3/25 + 3/722. 3/14 2/3 + 1/623. 1/5 2/3 + 5/624. 9/22 + 1
12、/11 1/225. 5/3 11/5 + 4/326. 45 2/3 + 1/3 1527. 7/19 + 12/19 5/628. 1/4 + 3/4 2/329. 8/7 21/16 + 1/230. 101 1/5 1/5 2131.5016040 (58+370)(64-45)32.120-14418+3533.347+452-41605234(58+37)(64-95)35.95(64-45)36.178-14556+42 420+580-64212837.812-700(9+3111) (136+64)(65-34523)38.85+14(14+20826)39.(284+16)
13、(512-820818)40.120-36418+3541.(58+37)(64-95)42.(6.8-6.80.55)8.543.0.12 4.80.124.844.(3.21.5+2.5)1.6 (2)3.2(1.5+2.5)1.645.6-1.64= 5.38+7.85-5.37=46.7.20.8-1.25= 6-1.193-0.43=47.6.5(4.8-1.24)= 0.681.9+0.321.948.10.15-10.750.4-5.749.5.8(3.87-0.13)+4.23.7450.32.52-(6+9.7283.2)2.551.-5+58+13+90+78-(-56)+5052.-7*2-57/(353.(-7)*2/(1/3)+79/(3+6/4)54.123+456+7