75÷〔138÷(100-54)〕85×(95-1440÷24)
80400-(4300+870÷15)240×78÷(154-115)
1437×27+27×563〔75-(12+18)〕÷15
2160÷〔(83-79)×18〕280+840÷24×5
325÷13×(266-250)
85×(95-1440÷24)
58870÷(105+20×2)
1437×27+27×563
81432÷(13×52+78)
[37.85-(7.85+6.4)]×30
156×[(17.7-7.2)÷3]
(947-599)+76×64
36×(913-276÷23)
[192-(54+38)]×67
[(7.1-5.6)×0.9-1.15]÷2.5
81432÷(13×52+78)
5.4÷[2.6×(3.7-2.9)+0.62]
(947-599)+76×64
60-(9.5+28.9)]÷0.18
2.881÷0.43-0.24×3.5
20×[(2.44-1.8)÷0.4+0.15]
28-(3.41.25×2.4)0.8×〔15.5-(3.215.79)〕
(31.83.2×4)÷5
194-64.8÷1.8×0.9
36.72÷4.25×9.93.416÷(0.016×35)
0.8×[(10-6.76)÷1.2]
(136+64)×(65-345÷23)
(6.8-6.8×0.55)÷8.5
0.12×4.8÷0.12×4.8
(58+37)÷(64-9×5)
812-700÷(9+31×11)
(3.2×1.5+2.5)÷1.6
85+14×(14+208÷26)
120-36×4÷18+35
(284+16)×(512-8208÷18)
9.72×1.6-18.305÷7
4/7÷[1/3×(3/5-3/10)]
(4/5+1/4)÷7/3+7/10
12.78-0÷(13.4+156.6)
37.812-700÷(9+31×11)
(136+64)×(65-345÷23)
3.2×(1.5+2.5)÷1.6
85+14×(14+208÷26)
(58+37)÷(64-9×5)
(6.8-6.8×0.55)÷8.5
(284+16)×(512-8208÷18)
0.12×4.8÷0.12×4.8
(3.2×1.5+2.5)÷1.6
120-36×4÷18+35
10.15-10.75×0.4-5.7
(1)判断下列方程是否是一元一次方程:
①-3x-6x2=7;()②()
③5x+1-2x=3x-2;()④3y-4=2y+1.()