一、口算。
$4+1+3=$
$9-1-6=$
$2+1+4=$
$4+12+2=$
$9-5+4=$
$3+2-4=$
$7-7+9=$
$4+5+1=$
$1+6+2=$
$3+2+2=$
$1+2-3=$
$8-5+3=$
$1+1+1=$
$2+3+1=$
$8-4+3=$
$5+2+1=$
$6+1-4=$
$13-10-1=$
$4+2-3=$
$2+3-2=$
$7+1+2=$
$3-2+1=$
$9-5+2=$
$4+4+2=$
$3+4+2=$
$5-2+1=$
$1+7-2=$
$3+2+3=$
$4+5-6=$
$9-8+7=$
$10-2-6=$
$2+2-1=$
$5-3+6=$
$10-5-3=$
$10-5-2=$
$16-6+0=$
$9-6+5=$
$1+1+2=$
$6+3+1=$
$2-1+1=$
$1+5+3=$
$3+3-3=$
$9-3-4=$
$1+3+4=$
$2+1+7=$
$9-3+2=$
$4-3+2=$
$5+4-7=$
$6+1+1=$
$2+4+4=$
$2+3-5=$
$7-2-4=$
$9-3-3=$
$7+1-6=$

1.8
2.2
3.7
4.18
5.8
6.1
7.9
8.10
9.9
10.7
11.0
12.6
13.3
14.6
15.7
16.8
17.3
18.2
19.3
20.2
21.10
22.2
23.6
24.10
25.9
26.4
27.6
28.8
29.3
30.8
31.2
32.3
33.8
34.2
35.3
36.10
37.8
38.4
39.10
40.2
41.9
42.3
43.2
44.8
45.10
46.8
47.3
48.2
49.8
50.10
51.0
52.1
53.3
54.2