16.
17.唱歌
18.6 4
19.3.528 352.8 0.28
20.33
21.15.602 15.60
22.a ÷320
23.28
24.5.2
25.黄
26.15
27.小明
28.51 25.5
29.
30.36.5 7.5 108 805
31.13.8
32.5a-10 25
33.2.358
34.3b+t
35.85-a 85+2a
36.3250 20
37.100 100
38.1327
39.173
40.15
41.5
42.19
43.420
44.2.4 1
45.9
46.(a²-b²)
47.2222.1111 22222.11111
48.24
49.a-11b 56
50.40