数学竞赛试题.doc

天林初中2015级2班第一学期数学竞赛试题 姓名:_ 成绩:_1.以下各题,直接写答案(也可以写出一些步骤). (+2)+(1)= (2)(+1)= (+3)(2)=(+6)(+3)= (+1)+(+5)= (1)2 = (20)+(+2)= (20)(1)= (30)(+2)=(5)+(+2)= (2)(1)= (+3)2 = (6)(3)= (3)( +2)= 57=(+3)+(1)= (2)(+3)= 2+3 =(+3)(4)= (+6)(+2)= (5)2 = (+3)(+1)= (+3)(+4)= (+6)(2)=(7)+(1)= (+2)(5)= (0.1)3 = (+2)(+1)= (+3)(+2)= (+6)(3)=(8)+(1)= (+2)(1)= (0.1)2 = (3)(2)= (6)(+3)= (1)3=(3)(5)= (6)(+2)= (3)3=(5)+(+1)= (2)(2)= 42 = (6)(2)= (3)(+4)= 56=2+5= (+8)+(1)= (7)(+1)= (+6)(2)= (+12)(+3)= (7)2= (+7)+(+5)= (+6)(+1)= (+5)(+2)= (+4)(3)= (1)+(+2)= (9)(1)= (8)(+2)= (7)(3)= (3)2 = 8+3= (+2)+(10)= (2)(+10)= (+3)(20)= (+6)(+1)= 102 = (+1)+(+50)= (7)+(1)= (- )2 = (+6)(1)= (4)(2)= (3)(+3)=(+2)(+10) = (+3)( +20)= (1)2009 = (+6)(30)= (8)+(10) = (+0.1)2 = (+2)(10)= (5)+(+20)= (2)(10)=(3)(+20)= (6)(30)= (+30)2= (+20)+(1)= 520= 2+30= (20)(+1)= (+30)(2)= ( )2 = (80)+(1)= (+20)(1)= (30)(2)=(60)(+3)= (60)(3)= ( )3 = (+20)2 = 07= 20+3=(+1)+(2)= (1)(+2)= (+2)(3)=(+5)(+4)= 0+(+4)= (+1)(+1)= (+4)(+1)= (+5)(2)= (0.1)2 = (9)+(1)= (+3)(2)= (3)(20)= (6)(+30)= (4)(1)= (10)3 = (5)(+2)= (6)+(+1)= (10)3 = (3)(1)= (4)(+1)= (7)(7)= (+6)2 = 68 = 24=(+1)+(1)= (7)(+1)= (+8)(2)(+12)(+3)= (+6)+(+5)= (6)2 = (+7)(+1)= (+15)(+2)= (+12)(3)= (13)+(1)= (+7)(1)= (0.6)2 = (8)(2)= (12)(+3)= (2)3=(10)+(+2)= (7)(1)= (8)(+2)=(12)(3)= (+8)2 = +107=(+2)+(6)= (2)(+6)= 7+3 = (+3)(7)= (+6)(+8) (1)2006= (+1)+(+10)= (+2)(+6)= (+3)(+7) = (8)+(6)= (+2)(6)= (0.6)2= (3)(7)= (6)(+12)= (4)3=(5)+(+7)= (2)(6)= (3)(+7)=(6)(1)= (+9)2 = 512=(+6)+(1)= (6)(+1)= 2+9= (+7) (2)= (+10)(+3)= (5)2 = (+5)+(+5)= (+6)(+1)= (+7)(+2)= (+10)(2)= (12)+(1)= (0.5)2 = (+6)(1)= (7)(2)= (10)(+5)= (9)+(+2)= (6)(1)= (7)(+2)=(10)(1)= +97= (+7)2 = (+60)(+3)= (100)2= 6+ = (+10)+(+5)= (+20)(+1)= (+30)(+2)= (+60)(3)= (+2)(+6)= (0.4)3 = (+6)+(1)= (6)(+1)= (+7)(2)=2.如果ab2+（a1）2=0， 则a=_，b=_.3.若规定ab=3ab，如24=324=24，则56=_.4.若m、n互为相反数，则m3+n=_.5.计算，（ ）2011.52012=_.6.若x2=(3)2，则x=_.7.已知a、b互为倒数，且a=b,则a20