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.(0.75+0.2)/0.25*25%+12/0.75+7.2/2.4
32.1.21*42-(4.46+0.14)*1375+450/18*25
33.1+0.45/0.9-0.75-168.1/(4.3*2-0.4)
34.605*8+3.5-44+10.9-(6.6+0.125/12.5%)
35.56*（56-65）*[0.325-62/30+（56/8）-65 ]
36.4/7*5/9 + 3/7*5/9-3/4 × 8/9 - 1/3
37.50＋160/40 *（58+370)/（64-45）
38.347+45×2-4160÷52
39.6-1.6÷4+ 5.38+7.85-5.37
40.5.4÷[2.6×（3.7-2.9）+0.62]