一、直接写出得数。(每题1分,共32分)
1-0.8=
2-0.7=
103×8=
9-0.1+0.1=
3+1.89=
0.6+1.8=
2-0.88=
8.2+1.8+1.3=
1.6+4.8=
356-149=
4.6+0.9=
0.3+0.86-0.5=
678÷6=
2.8+1.9=
7.2+1.83=
0.17+0.33+0.2=
1.9+0.4=
8.2-1.8=
480÷15=
21×50÷7=
9.9-1.1=
4.2-1.3=
8.4-0.72=
10-0.02-0.08=
115×30=
2.3-0.4=
2.8+0.34=
1.86-0.9+0.14=
1.3+0.37=
7.2+0.8=
12.3+1.23=
40.3+(55.9-40.3)=

0.2 1.3 824 9 4.89 2.4 1.12 11.3 6.4 207 5.5 0.66 113 4.7 9.03 0.7 2.3 6.4 32 150 8.8 2.9 7.68 9.9 3450 1.9 3.14 1.1 1.67 8 13.53 55.9

二、用竖式计算,带☆的要验算。(每题3分,验算各1分,共20分)
14.36+5.84=
☆20.9+19.72=
36.7+0.98=
32.8+43.29=
☆70.03-0.8=
140-23.45=

20.2 40.62 37.68 76.09 69.23 116.55 竖式及验算略

```
14.36
+ 5.84
------
20.20
20.90
+ 19.72
------
40.62
验算：
40.62
19.72
------
20.90
36.70
+ 0.98
------
37.68
32.80
+ 43.29
------
76.09
70.03
0.80
------
69.23
验算：
69.23
+ 0.80
------
70.03
140.00
23.45
------
116.55
```

三、计算下面各题。(每题3分,共18分)
3.25+1.89+2.44
3.757-0.2+1.81
55.24-16.68-14.5
6.93+1.37-5.86
8.4-0.86+3.99
6.92+1.97-0.186

7.58 5.367 24.06 2.44 11.53 8.704

3.25+1.89+2.44=5.14+2.44=7.58
3.757-0.2+1.81=3.557+1.81=5.367
55.24-16.68-14.5=38.56-14.5=24.06
6.93+1.37-5.86=8.3-5.86=2.44
8.4-0.86+3.99=7.54+3.99=11.53
6.92+1.97-0.186=8.89-0.186=8.704