一、在下面的$□$里填上合适的数。
$0.9×□= 74.7$ $3.2×□= 14.4$
$131.2÷□= 2.05$ $52.5÷□= 0.75$
$0.9×□= 74.7$ $3.2×□= 14.4$
$131.2÷□= 2.05$ $52.5÷□= 0.75$
答案
83 4.5 64 70
二、根据$522÷18= 29$,写出下面各题的商。
$52.2÷1.8= $ $5.22÷1.8= $
$52.2÷0.18= $ $522÷0.18= $
$52.2÷1.8= $ $5.22÷1.8= $
$52.2÷0.18= $ $522÷0.18= $
答案
29 2.9 290 2900
解析
$52.2\÷1.8=29$
$5.22\÷1.8=2.9$
$52.2\÷0.18=290$
$522\÷0.18=2900$
$5.22\÷1.8=2.9$
$52.2\÷0.18=290$
$522\÷0.18=2900$
三、列竖式计算。
$6.12÷1.7= $ $34.8÷2.4= $
$25.9÷0.74= $ $0.78÷0.6= $
$6.12÷1.7= $ $34.8÷2.4= $
$25.9÷0.74= $ $0.78÷0.6= $
答案
3.6 14.5 35 1.3
解析
```
3.6
1.7)6.1.2
5 1
---
1 02
1 02
---
0
14.5
2.4)34.8.0
24
---
108
96
---
120
120
---
0
35
0.74)25.90
222
---
370
370
---
0
1.3
0.6)0.7.8
6
---
18
18
---
0
```
3.6
1.7)6.1.2
5 1
---
1 02
1 02
---
0
14.5
2.4)34.8.0
24
---
108
96
---
120
120
---
0
35
0.74)25.90
222
---
370
370
---
0
1.3
0.6)0.7.8
6
---
18
18
---
0
```
1. 在下面的$◯$里填上“$>$”“$<$”或“$=$”。
$4.82÷0.9◯4.82$ $3.5÷6.75◯3.5$
$0.68÷0.1◯6.8$ $3.63÷0.99◯3.63$
$4.82÷0.9◯4.82$ $3.5÷6.75◯3.5$
$0.68÷0.1◯6.8$ $3.63÷0.99◯3.63$
答案
1. > < = >
2. 在下面的( )里填上合适的数。
$0.75÷12.5= ( )÷125$ $75÷1.25= ( )÷125$
$64.6÷0.34= ( )÷34$ $0.75÷0.125= ( )÷125$
$0.75÷12.5= ( )÷125$ $75÷1.25= ( )÷125$
$64.6÷0.34= ( )÷34$ $0.75÷0.125= ( )÷125$
答案
2. 7.5 7500 6460 750
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