初一数学竞赛训练.pdf

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1、1A230300B730745C12451300D1800183024235611A14B15C26D273ABCDFCDBCBE3ABCDA4160.40+0.41+0.42++0.59()A1B2C3D4541A4B5C15D166n1002007n+25nA1B2C3D47302010A4959B4536C4400D40328aba1xB6yAxyBxyCxyDxy9181272612333A8B9C10D1110ababa71255a6355A285B305C375D3801805%______21

2、002001123100__________31x24232.5x=______________30.12584125_____________541_______6abab=35ab=_____________74123______84161_________________91990_____________1A1B1C0D1+101999200022+(2)19991999A2B2C2D23ab

3、a

4、=a

5、b

6、babABCD4ab323aba2b3abaABCD2ba2b3aba3a

7、b0516055A+2B2CD+2336a

8、1999=_________________________555555555ð1ð2ðLð3540_________40562abcde3abcde9_______________7ABCDFCDBCBE3ABCD________8________9ab0

9、ab2

10、+b1=01111ðLab(a1)(b1)(a2)(b2)(a1997)(b1997)2abcdx2219991998x(abcd

11、)x(ab)(cd)3ABCDEFSDEF=49SABCFACBED24100m101512451917911131531()221=____________312203042562n12n131n22(x3)n203xx(xx)333_______________m314n30.3xyxy2233332325xy4y2xy3x)(2x5xy3y2xy)____________42685xa3xa15x3x2x4x13

12、128_______________6ABAB1AO3BO________2221222712ðLnn(n1)(2n1),24ðL50________68dacb0,dbcaabcd_______915/5/2____________100.199500.1995______________1__________q2pqp+q=1994p_______3ABCD1341212312512681___________516131510_______6x1,y1,y1

13、2yx4_________7xyxy=2x+2xy+yabab=1994ab_______8101041______13319951x211002x199510019951112211113123100001000090091100210004191193321a%a1aAa%B1+a%CD100a100a22mma0

14、ac21.1331111111ABabbacbaabc111111CDcbaabcabba225x=9y=42x+5xy+3y=30A2B6C12D161

15、2001x2001

16、=2001__________________2xyxy=ax+bycxyabc12=323=4xm=xm0m________________3202020___________________224m=___