求比值
80:240.5:0.20.15:2136:18
13:913:121.01:10121:24
36:7220:4089.5:210.5:21
3.14:28.2641.23:412315:0.1210:120
123:365:133:142:54
20.5:5020*5:3.5*910:12.53980.9.8
54.6:321052:87467:46.71.1:13
12:692.2:4045:96.33:3695
52.9:27.42.5:40.592:26456:46/26
5624:20*8.53464:87/569:5/24:6*2
8.8:3235545:20.6815:5/810/63:6*5
3/4:7/83/5:0.273.5:2/5
化简比
100:6816.5:96.325.5:9312.4:2/3
29.6:100/12023.6:15046:961.1:11
3.6:1.24.8:1/24.9:0.714:28.26
41.23:412315:0.1210:120123:3
65:133:142:540.15:21
分数、小数四则混合运算
1.3/7×49/9-4/3
2.8/9×15/36+1/27
3.12×5/6–2/9×3
4.8×5/4+1/4
5.6÷3/8–3/8÷6
6.4/7×5/9+3/7×5/9
7.5/2-(3/2+4/5)
8.7/8+(1/8+1/9)
9.9×5/6+5/6
10.3/4×8/9-1/3
11.7×5/49+3/14
12.6×(1/2+2/3)
13.8×4/5+8×11/5
14.31×5/6–5/6
15.9/7-(2/7–10/21)
16.5/9×18–14×2/7
17.4/5×25/16+2/3×3/4
18.14×8/7–5/6×12/15
19.17/32–3/4×9/24
20.3×2/9+1/3
21.5/7×3/25+3/7
22.3/14××2/3+1/6
23.1/5×2/3+5/6
24.9/22+1/11÷1/2
25.5/3×11/5+4/3
26.45×2/3+1/3×15
27.7/19+12/19×5/6
28.1/4+3/4÷2/3
29.8/7×21/16+1/2
30.101×1/5–1/5×21
31.50+160÷40
32.120-144÷18+35
33.347+45×2-4160÷52
34(58+37)÷(64-9×5)
35.95÷(64-45)
36.178-145÷5×6+42
37.812-700÷(9+31×11)
38.85+14×(14+208÷26)
39.(284+16)×(512-8208÷18)
40.120-36×4÷18+35
41.(58+37)÷(64-9×5)
42.(6.8-6.8×0.55)÷8.5
43.0.12×4.8÷0.12×4.8
44.(3.2×1.5+2.5)÷1.6
45.6-1.6÷4=5.38+7.85-5.37=
46.7.2÷0.8-1.2×5=6-1.19×
3-0.43=
47.6.5×(4.8-1.2×4)=
49.5.8×(3.87-0.13)+4.2×3.74
50.32.52-(6+9.728÷3.2)×2.5
51.[(7.1-5.6)×0.9-1.15]÷2.5
52.5.4÷[2.6×(3.7-2.9)+0.62]
53.12×6÷(12-7.2)-6
(54)12×6÷7.2-6
(55)0.68×1.9+0.32×1.9
(56)(58+370)÷(64-45)
(57)420+580-64×21÷28
(58)(136+64)×(65-345÷23)
(59)48.10.15-10.75×0.4-5.7
1.18.1+(3-0.299÷0.23)×
1
2.(6.8-6.8×0.55)÷8.5
3.0.12×4.8÷0.12×4.8
4.(3.2×1.5+2.5)÷1.6
(2)3.2×(1.5+2.5)÷1.6
5.6-1.6÷4=
6.5.38+7.85-5.37=
6.7.2÷0.8-1.2×5=
7.6-1.19×3-0.43=
7.6.5×(4.8-1.2×4)=
8.0.68×1.9+0.32×1.9
8.10.15-10.75×0.4-5.7
9.5.8×(3.87-0.13)+4.2×3.74
10.32.52-(6+9.728÷3.2)×2.5
11.[(7.1-5.6)×0.9-1.15]÷
2.5
12.5.4÷[2.6×(3.7-2.9)+0.62]
13.12×6÷(12-7.2)-6
14.12×6÷7.2-6
15.33.02-(148.4-90.85)÷2.5
解方程
1、12-3(9-x)=5(x-4)-7(7-x);x=6;
2、6x-17=13x=5
3、9-10x=10-9xx=-1
4、2(x-1)=4.x=3
5、13x-26=13x=3
6、75-5x=70x=1
7、2(6x-2)=8x=1
8、25x(12-6)=300x=2
9、24x+12=132x=5
10、56=12x+8x=4
11、2x+4=30x=13
12、12x=11x-79x=79
13、13x-12(x+2)=0x=24
14、67-12x=7x=5
15、(x-1)-(3x+2)=-(x-1)x=3
16、18x-16x+18×1+50=70x=1
17、14×(60-x)×2=20xx=35
18、4x+9(x+2)=200x=14
19、100(x+1)+10x+(3x-2)+100(3x-2)+10x+(x+1)=1171x=3
20、5x+4.5(103-x)=486x=45
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