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
31.1/3*(5*(2/3))
32.(1+37%)*20
33.35/2*75%
34.30*(50/2)
35.(54+10%)/20
36.(25/3*18)*30%
37.(2+70%)*40
38.1/7*(98*(1/4)*2)
39.25%*((23+2%)*4)
40.(30+20%)/2
41.12*3/(25+20%)
42.30/(3+40%)
43.27/8*16*10%
44.(2/3)*(3+6)*(1/2)
45.45*(1/9)*24
46.(35+10%)*27
47.(45+50%)*3*1/2
48.(43*20%)+(3*(1/9))
49.27*(9*(1/3))*5%
50.14*15%+25*8*(1/4)
51.7*(1/2)/49
52.(1+48%)*2
53.(4*8-12)*50%
54.(48/60%)/10
55.63*(1/7)*30%
56.(0.75+0.2)/0.25*25% 12/0.75+7.2/2.4
57.605*8+3.5-44 10.9-(6.6+0.125/12.5%)
58.980-9.8)*0.6-2.12 (0.125*8-0.5)*4
59.1+0.45/0.9-0.75 168.1/(4.3*2-0.4)
60.1.21*42-(4.46+0.14) 1375+450/18*25
61.18/1.5-0.5*0.3
62.1.9-1.9*(1.9-1.9)
63.405-2940÷28×21
64.320-1680÷40÷7
65.90+47×52-398
66.48+3328÷64-75
67.60×24÷32+730
68.2100-94+48×54
69.51+（2304-2042）×23
70.4215+（4361-716）÷81
71.5/6×3/5+4/7+3/7
72.-19.8-(-20.3)-(+20.2)-10.8
73.0.25- +(-1 )-(+3 )
74.-50-28+(-24)-(-22)
75.-19.8-(-20.3)-(+20.2)-10.8;