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1、五年級小數(shù)、分數(shù)簡便運算練習題
5.832+4.27 (45.9-32.7)80.125 9.799+9.7
4.3612.58 15.613.1-15.6-15.62.1 0.65101
27.53.7-7.53.7 8.542.50.4 3.834.56+3.835.44
52.80.40.25 586-458127 0.2516.24
3.723.5+6.283.5 3.6102 4.8
2、7.8+780.52
6.40.25+3.60.25 4.8-4.80.5 (1.25-0.125)8
4.8100.1 56.59.9+56.5 7.0910.8-0.87.09
3201.258 18.769.9+18.76 3.522.50.4
.252.532 3.6510.1 3.6-3.60.8
15.20.254
3、 4.299+4.2 0.89100.1
一、 豎式計算。
1、(得數(shù)保留一位小數(shù))
(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(用乘法驗算) (9)0.64619
2、(除不盡的保留兩位小數(shù))
(11)31.2 (12) 2.70.36 (13) 88.41.7
(14) 7.5250.38 (15)415 (1
4、6)91.20.57
(17) 84.841.2 (18) 5.636.1 (19)5677
(20)1.474.2 (21)19.190.95 (22) 56.296.1
(23)2333 (24)7.410.57 (25) 21240
(26)9.6816 (27) 3.850.76 (28)53.34.7
(29)56.296.1 (30)28.7431
3、得數(shù)用循環(huán)小數(shù)表示。
(31) 0.20.06 (32) 1311 (33)30.133
(34) 1715 (
5、35)7.82.2 (36)5.529
(37)67.811 (38)87
二、能簡便計算的要簡便計算
(39)2.53.60.9 (40)12.50.38.8 (41)1.25(100-8)
(42)42(5.250.25) (43)0.4+12.60.280.2
(44) 8.4-8.41.51.8 (45)12.54.5+4.512.5+12.5
(46) 1.298 (47)2.41.250.3
(52) (0.25+2.5+25)0.4 (53) 3.51.02+350.098
(
6、54)0.2799+0.27 (55) 2.53.20.125
(56) 13.52.50.1250.4 (57) 2.614.5+2.616.5-2.61
(58) 3.41.01 (59) 6.51.98
(60)6.80.750.5 (61)13.750.125–2.75
(62)1.53+23.47.2 (63)22.9-13.68+12.68
(64) 4.711-4.7 (65) 28.86.3-6.318.8
(66)4.8+5.24 (67)5.
7、37—(2.37+1.8)
(69)2.851.250.8 (70)10.50.2512
(71) 3.791.6+7.391.6-91.6
(72)3.20.82+3.21.18 (73)4.050.5-1.14
(75)12.50.42.58 (76)7.75[20(3.24-3.04)]
(77)43.2-1.83-4.6 (78)4.27.8+2.24.2
(79) 0.873.16+4.64 (80)12.54.8
(81)4.74.7+4.76.3-4.7 (82)12.53.20.25
8、
(83)23.47.2+6.50.8 (84)20.64-9.83-0.17
(85)6.8(1.2+0.5)0.04 (86) 7.26-5.4+1.74-1.6
(87)2.06+2.0699 (88)9.5101
(91)2.80.5+0.528.2-0.5 (92)3.22.51.25
(93) 7.2[(7.22-6.4)0.9] (94)4.6532+2.546.5+0.465430
(96)0.461.9+0.541.9 (97) 3.45102 (98) 12.5 88
9、
(99) 13.650.254 (100) 28.986.3 -3.15
三、解方程
8x=24 x0.5=1.2 x-3.8=9.53 2.4x=26.4
4.06+x=7.11 x1.5=1.5 3x-24=9 13x+27=40
966+4x=56 3x-1.2x=9 3.6x+21.4=8.2
180.6-10x=4.26 0.4(x-3)=0.72 1.5(10-x)=3
2.8(3
10、+x)=3.50.2 0.8(x+4.8)=5.2(x-6)0.5=3
4x-45+18=21 1.6x-9=3.8 4(0.9+x)=4.8
(x-1.9)5=1.1 0.420-0.4x=6 24x-8x=28.8
4.5x+1.6x=42.7 (7-1.4)x=2.8 9x-5.26=4.8
(2.5+x)0.8=5 0.5(x-1.8)=2.4 22.52+5x=135
4(0.3+x)=4.80.420-0.4x=6 (4x-0.32)+1.6=2.
11、08
3.5x-x=17.5 4x-10=x+110 8.9-5x=2.7
3.545-1.7x=13.45 1.6x+2x0.7=18 4x-0.32+1.6=2.08
28-x+3.6=20 3.5x-0.8x=11.34 9x-145.5=58
6.2x-x=41.6 2.8(3+x)=3.50.2 3x+27=50
12 (x+3.7)=144 5x-311=42 1.82-0.3x=2.4
7.2x-3.6x=90.4 x-0.8x+0.7x=8.1