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1、计算题专题 一、竖式计算。1、(得数保留一位小数)(1)0.380.23 (2)5.793.6 (3)4.60.25 (4)624 (5)52.9575 (6)3.017 (7)4.9511 (8)84.0131(用乘法验算)(9)0.64619 (10)4.7 0.59 2、(除不尽的保留两位小数)(11)31.2 (12)2.70.36 (13)88.41.7 (14)7.5250.38 (15)415 (16)91.20.57 (17)84.84 1.2 (18)5.636.1 (19)5677 (20)1.474.2 (21)19.190.95 (22)56.296.1 (23)233
2、3 (24)7.410.57 (25)21 240 (26)9.6816 (27)3.85 0.76 (28)53.34.7 (29)56.296.1 (30)28.7431 3、得数用循环小数表示。(31)0.2 0.06 (32)13 11 (33)30.1 33 (34)1715 (35)7.8 2.2 (36)5.529 (37)67.811 (38)87 二、能简便计算的要简便计算(39)2.5 3.6 0.9 (40)12.50.3 8.8 (41)1.25(100 8)(42)42(5.25 0.25)(43)0.412.6 0.28 0.2 (44)8.48.4 1.5 1.8
3、 (45)12.5 4.5+4.5 12.5+12.5 (46)1.298 (47)2.41.25 0.3 (48)(200.8 9)5.7 (49)0.8133.12 5.28 (50)118(11.4 12.5 0.8)(51)50(6.7 0.02)(52)(0.25 2.5 25)0.4 (53)3.51.02+35 0.098 (54)0.27 990.27 (55)2.53.2 0.125 (56)13.52.5 0.125 0.4 8 (57)2.614.5 2.61 6.5 2.61 (58)3.41.01 (59)6.5 1.98 (60)6.80.750.5 (61)13.
4、750.1252.75 (62)1.53+23.47.2 (63)22.913.6812.68 (64)4.7114.7 (65)28.86.3 6.3 18.8 (66)4.8 5.2 4 (67)5.37(2.37 1.8)(68)10.012.78 1.59 (69)2.85 1.25 0.8 (70)10.50.25 12 (71)3.7 91.6+7.3 91.6 91.6 (72)3.2 0.82 3.2 1.18 (73)4.050.5 1.14 (74)1.58991.58 (75)12.50.42.58 (76)7.75 20(3.24-3.04)(77)43.2 1.83
5、4.6 (78)4.27.8+2.24.2 (79)0.873.16+4.64 (80)12.54.8 (81)4.74.7+4.76.34.7 (82)12.5 3.2 0.25 (83)23.4 7.2 6.5 0.8 (84)20.64 9.83 0.17 (85)6.8(1.2+0.5)0.04 (86)7.265.4 1.74 1.6 (87)2.06 2.06 99 (88)9.5101 (89)1002.70.36 2.5 5 (90)(1.62 1.62 1.62 1.62)1.8 2.5 (91)2.8 0.5 0.5 28.2 0.5 (92)3.2 2.5 1.25 (9
6、3)7.2(7.22 6.4)0.9 (94)4.6532+2.546.5+0.465430 (95)7.2567.875+7250.7875+72500.053375 (96)0.46 1.9 0.541.9 (97)3.45 102 (98)12.5 88 (99)13.65 0.25 6 (100)28.98 6.3-3.15 三、解方程(101)8x24 (102)x0.5 1.2 (103)x3.8=9.53 (104)4.06x=7.11 (105)x 1.5=1.5 (106)2.4x=26.4 (107)3x24=9 (108)13x+27=40 (109)966+4x=56(
7、110)3x1.2x=9 (111)3.6x 21.4 8.2 (112)180.6 10 x=4.26 (113)0.4(x3)=0.72 (114)1.5(10 x)=3 (115)2.8(3x)=3.5 0.2 (116)0.8(x4.8)=5.2 (117)(x6)0.5=3 (118)4x4518=21(119)1.6x 9=3.8 (120)4(0.9 x)=4.8 (121)(x 1.9)5=1.1 (122)0.4 20 0.4x=6 (123)24x 8x=28.8 (124)4.5x+1.6x=42.7 (125)(71.4)x=2.8 (126)9x 5.2 6=4.8
8、(127)(2.5x)0.8=5 (128)0.5(x1.8)=2.4 (129)22.5 25x=135 (130)4(0.3 x)=4.8 (131)0.4200.4x=6 (132)(4x 0.32)1.6=2.08 (133)3.5xx=17.5 (134)4x10=x110 (135)8.9 5x=2.7 (136)3.5451.7x=13.45 (137)1.6x2x0.7=18 (138)4x0.32 1.6=2.08 (139)28x3.6 20 (140)3.5x 0.8x 11.34 (141)9x145.5 58 (142)6.2x x41.6 (143)2.8(3 x)=3.5 0.2 (144)3x+27=50 (145)12(x 3.7)144 (146)5x311=42 (147)7.2x 3.6x 90.4 (148)0.8 0.7 8.1 (149)1.8 20.3x 2.4