1、(1)0.8331.25(2)10(3)9.564.8751.44(4)6(5)4.618.415(7)416(8)182(9)2801.25(10)251.2548(11)0.73.94.36.1(12)7.35997.35(13)47817(14)46101(15)15.624(17)142143(18)(19)(20)3(21)(22)4312(23)(24)75(25)()24(26)20532656(28)()(29)411.750.4(32)()45(33)2()(34)0.31(3.32.95)(36)()()(37)()(38)()35(39)24()(41)()(43)8.6
2、4.3(44)(0.25)(45)3.6(4.72.3)1.2(49) (50)(51)()(52)60()(55)()(58)12()(59)(910)(75)(10)(77)()(78)25.12517.4(79)0.3874(81)1712(82)()(86)()(87)(20.121)5.1(88)7.65.41.95.4(89)0.2(0.15)(90)24(5)(92)(95)1516(96)3.641(2.09)(97)()45 (60)101.125.935.10.85(61)()(1)(62)2.62(63)31(65)(66)()(67)()(68)11.2512.21(6
3、9)81.25(70)44(71)() (74)(75)(10)(77)()(78)25.12517.4(79)0.3874(81)1712(82)()(86)()(87)(20.121)5.1(88)7.65.41.95.4(89)0.2(0.15)(90)24(5)(92)(95)1516(96)3.641(2.09)(97)()45 34.501604035.120-14418+3536.347+452-41605237(58+37)(64-95)38.95(64-45)39.178-14556+4240.812-700(9+3111)41.85+14(14+20826)43.120-3
4、6418+3544.(58+37)(64-95)45.(6.8-6.80.55)8.546.0.12 4.80.124.847.(3.21.5+2.5)1.61(+) 3 (1) 7 (+) 25() + ()(+) 1(+)3.5 (1)4 + (+) 12(1) (1) (1)4 8 () (+)(1) 3+ + 72(+) 2+ + +7 4 (9+) + + 2 30(+) + 6 +512(+) + 4 48(+) 9+ 24(+) (+)6027 5 ()70 97 8+2 15+15(+)72 72(+) (+)9+ 30(+) (+) 5+7+5 ()24) (+) (+) (
5、3217) (25) () 3 (2121) (99)9 () ()30 4 5841 ()23513518 153 0.653 () 10 + 25 13.098.124.88 12103450075 () ()1511 37.519.52.54 3 + 18(+)(98)()5(101)()(102)1010(103)(104)7(0.352)(105)()(106)4143(107)()(108)8.50.7556.51(109)10.540.90.75(110)999(111)24()3(112)()(113)()(114)()(115)(116)()(117)(1)(118)(5)(
6、119)(1)(120)(121)(3211)(122)41()(123)73.2525.48(124)6434(125)(4)(126)(111999)56()(127)()160(128)15(25)(129)6.41.253(130)0.254()(134)(135)()(136)()(139)280(7.286.72)(140)15.632(1)3.63、解方程。(16分) 12 = (+)=5X3= X= 8x3 (x6)25X X= 2X + = X=20XX121 5X3 X126X5 =13.4 3X=X= XX= 4X6=2X= X = X = X = 4x3 9 = 29
7、x + x = 4X21=4 6X5 =13.4 X-X= 46385X= X= X=X=12 X= X=X= X-0.25=4+0.7X=102 X+X=42 X+X=105X-X=400 X-0.125X=8 = X+X=18 X( + )= x0.375x=x+=4 XX12 5 X2.4580.365- x = (x- 4.5) = 7x- 0.8x = 16+6 20 x 8.5= 1.5 x- x -4= 21 XX= x-x=14 +x= 7-=2xX+5=X X += 5 x -x=45= 7= = = 12=24= 2= 12= 1= = 8= = = 3= = = 240=
8、 = = 12= = = =1= 3 = (+)12= 1= 1= = = ()=2、求比值1 : 0.12 : 0.33化成最简单的整数比。 : 5.6 : 0.7 15 : 124计算下面各题,能简算的用简便方法算。(1)24 (2) (3)()(4) (5)(+)28 (6)+(7)3 (8)(9) + 11 (10)()(11) (12)(13) (14)()5解方程。(1) = (2)+=(3) (4)(5)-50%=12 (6)(7)=240 (8) 6.解比例(1)6 = (2) =(3) = 26 (4) = 50.1 (附加页,此页选做) 用简便方法计算(1)1125997
9、(2) 998+1246+9989 (3)(870087087)87(4)1258.8 (5)1.34.253.73.75 (6) 17.15(3.52.85)(7)3.4993.4 (8) 4.81.01 (9)0.4(2.573) (10)(1.61.61.61.6)25 (11)() (12) (13)12.32.455.74.55 (14)2 (15) 0.1250.2564(16)64.2870.6421300 (17)78367.87417 (18)178(19)0.1250.5 (20)2.42+4.5843 (21) 25100(22)4.253(21) (23)3.83.93.90.10.13.9 (24)12.1(+)105 自我评价 1.直接写出得数。 2.解方程。 3.计算下面各题,能简算的要用简便方法算。 5841 4.先化简比,再求比值。