2.7/19 + 12/19 × 5/6
3.1/4 + 3/4 ÷ 2/3
4.8/7 × 21/16 + 1/2
5.101 × 1/5 – 1/5 × 21
6.3/7 × 49/9 - 4/3
7.8/9 × 15/36 + 1/27
8.12× 5/6 – 2/9 ×3
9.8× 5/4 + 1/4
10.6÷ 3/8 – 3/8 ÷6
11.4/7 × 5/9 + 3/7 × 5/9
12.5/2 -（ 3/2 + 4/5 ）
13.7/8 + （ 1/8 + 1/9 ）
14.9 × 5/6 + 5/6
15.3/4 × 8/9 - 1/3
16.7 × 5/49 + 3/14
17.6 ×（ 1/2 + 2/3 ）
18.8 × 4/5 + 8 × 11/5
19.31 × 5/6 – 5/6
20.9/7 - （ 2/7 – 10/21 ）
21.5/9 × 18 – 14 × 2/7
22.4/5 × 25/16 + 2/3 × 3/4
23.14 × 8/7 – 5/6 × 12/15
24.17/32 – 3/4 × 9/24
25.3 × 2/9 + 1/3
26.5/7 × 3/25 + 3/7
27.3/14 ×× 2/3 + 1/6
28.1/5 × 2/3 + 5/6
29.9/22 + 1/11 ÷ 1/2
30.5/3 × 11/5 + 4/3
31.45 × 2/3 + 1/3 × 15
32.7/19 + 12/19 × 5/6
33.1/4 + 3/4 ÷ 2/3
34.8/7 × 21/16 + 1/2
35.101 × 1/5 – 1/5 × 21
36.(6.8-6.8×0.55)÷8.5
37.0.12× 4.8÷0.12×4.8
38.（3.2×1.5+2.5）÷1.6
39.3.2×（1.5+2.5）÷1.6
40.5.38+7.85-5.37
41.7.2÷0.8-1.2×5
42.6-1.19×3-0.43
43.6.5×（4.8-1.2×4）
44.0.68×1.9+0.32×1.9
45.10.15-10.75×0.4-5.7
46.5.8×（3.87-0.13）+4.2×3.74
47.32.52-（6+9.728÷3.2）×2.5
48.[（7.1-5.6）×0.9-1.15]÷2.5
49.5.4÷[2.6×（3.7-2.9）+0.62]
50.12×6÷（12-7.2）-6
51.12×6÷7.2-6
52.1+1/5+1/6-1/12-1/1
53.1+1/5+1/6-1/12-1/2
54.1+1/5+1/6-1/12-1/3
55.1+1/5+1/6-1/12-1/4
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