求20道方程题,和简便算法计算小数,分数.下册的
求20道方程题,和简便算法计算小数,分数.
下册的
求20道方程题,和简便算法计算小数,分数.下册的
求20道方程题,和简便算法计算小数,分数.
下册的
31×43-31+58×3156×78+13×83+27×78+83×9
199+99×997.63×9.9+0.763
3.74×5.8+62.6×0.583.43×14+1.4×75.7-14
1.120-36×4÷18+35
2.(58+37)÷(64-9×5)
3.(6.8-6.8×0.55)÷8.5
4.0.12×4.8÷0.12×4.8
5.(3.2×1.5+2.5)÷1.6(2)3.2×(1.5+2.5)÷1.6
6.6-1.6÷4=5.38+7.85-5.37=
7.7.2÷0.8-1.2×5=6-1.19×3-0.43=
8.6.5×(4.8-1.2×4)=0.68×1.9+0.32×1.9
9.10.15-10.75×0.4-5.7
10.5.8×(3.87-0.13)+4.2×3.74
11.32.52-(6+9.728÷3.2)×2.5
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.[-|98|+76+(-87)]*23[56+(-75)-(7)]-(8+4+3)
32.5+21*8/2-6-59
33.68/21-8-11*8+61
34.-2/9-7/9-56
35.4.6-(-3/4+1.6-4-3/4)
36.1/2+3+5/6-7/12
37.[2/3-4-1/4*(-0.4)]/1/3+2
38.22+(-4)+(-2)+4*3
39.-2*8-8*1/2+8/1/8
40.(2/3+1/2)/(-1/12)*(-12)
41.(-28)/(-6+4)+(-1)
42.2/(-2)+0/7-(-8)*(-2)
43.(1/4-5/6+1/3+2/3)/1/2
44.18-6/(-3)*(-2)
45.(5+3/8*8/30/(-2)-3
46.(-84)/2*(-3)/(-6)
47.1/2*(-4/15)/2/3
48.-3x+2y-5x-7y
49.2/3÷1/2-1/4×2/5
50.2-6/13÷9/26-2/3
解方程.
①12-4x=2
②38:x=4.75:1
③1/3x+5/6x=1.4
12x+34x=1
18x-14x=12
23x-5×14=14
12+34x=56
22-14x=12
23x-14x=14
x+14x=65
23x=14x+14
30x-12x-14x=12
20%+(1-20%)(320-x)=320×40%
2(x-2)+2=x+1
2(x-2)-3(4x-1)=9(1-x)
11x+64-2x=100-9x
15-(8-5x)=7x+(4-3x)
3(x-7)-2[9-4(2-x)]=22
3/2[2/3(1/4x-1)-2]-x=2