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一、口算。
$8.4÷4=
$0.84÷4=
$6.52÷4=
$32.4÷6=
$12.6÷7=
$7.5÷3=
$67.2÷4=
$6.65÷5=
$8.4÷4=
2.1
$ $9.6÷8=1.2
$ $7.5÷5=1.5
$$0.84÷4=
0.21
$ $0.96÷8=0.12
$ $0.75÷5=0.15
$$6.52÷4=
1.63
$ $8.04÷6=1.34
$ $3.34÷2=1.67
$$32.4÷6=
5.4
$ $5.4÷3=1.8
$ $6.48÷4=1.62
$$12.6÷7=
1.8
$ $4.52÷2=2.26
$ $19.2÷8=2.4
$$7.5÷3=
2.5
$ $24.6÷6=4.1
$ $7.68÷4=1.92
$$67.2÷4=
16.8
$ $15.3÷3=5.1
$ $9.12÷8=1.14
$$6.65÷5=
1.33
$ $50.4÷7=7.2
$ $7.92÷6=1.32
$答案
一、2.1 1.2 1.5 0.21 0.12 0.15 1.63 1.34 1.67 5.4 1.8 1.62 1.8 2.26 2.4 2.5 4.1 1.92 16.8 5.1 1.14 1.33 7.2 1.32
二、用竖式计算。
$82.8÷69$ $5.04÷90$ $6.615÷45$
$92.5÷5$ $30÷12$ $1.739÷37$
$82.8÷69$ $5.04÷90$ $6.615÷45$
$92.5÷5$ $30÷12$ $1.739÷37$
答案
二、1.2 0.056 0.147 18.5 2.5 0.047
解析
```
82.8÷69=1.2
1.2
69)82.8
69
---
138
138
---
0
5.04÷90=0.056
0.056
90)5.040
450
---
540
540
---
0
6.615÷45=0.147
0.147
45)6.615
45
---
211
180
---
315
315
---
0
92.5÷5=18.5
18.5
5)92.5
5
---
42
40
---
25
25
---
0
30÷12=2.5
2.5
12)30.0
24
---
60
60
---
0
1.739÷37=0.047
0.047
37)1.739
148
---
259
259
---
0
```
82.8÷69=1.2
1.2
69)82.8
69
---
138
138
---
0
5.04÷90=0.056
0.056
90)5.040
450
---
540
540
---
0
6.615÷45=0.147
0.147
45)6.615
45
---
211
180
---
315
315
---
0
92.5÷5=18.5
18.5
5)92.5
5
---
42
40
---
25
25
---
0
30÷12=2.5
2.5
12)30.0
24
---
60
60
---
0
1.739÷37=0.047
0.047
37)1.739
148
---
259
259
---
0
```
