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一、在下面的$◯$里填上“$＞$”“$＜$”或“$=$”。
$9.8÷0.12◯9.8$ $9.8◯9.8÷1.2$ $6.75÷25◯1$
$7.89÷0.9◯1$ $81÷1.5◯54$ $0.375÷2.4◯3.75÷24$
$9.8÷0.12◯9.8$ $9.8◯9.8÷1.2$ $6.75÷25◯1$
$7.89÷0.9◯1$ $81÷1.5◯54$ $0.375÷2.4◯3.75÷24$
答案
＞＞＜＞＝＝
解析
$9.8÷0.12＞9.8$
$9.8＞9.8÷1.2$
$6.75÷25＜1$
$7.89÷0.9＞1$
$81÷1.5＝54$
$0.375÷2.4＝3.75÷24$
$9.8＞9.8÷1.2$
$6.75÷25＜1$
$7.89÷0.9＞1$
$81÷1.5＝54$
$0.375÷2.4＝3.75÷24$
二、列竖式计算,并用乘法验算。
$2.04÷2.4= $ $36.4÷5.2= $ $6.21÷0.3= $
$2.04÷2.4= $ $36.4÷5.2= $ $6.21÷0.3= $
答案
0.85 7 20.7
解析
$2.04÷2.4$
```
0.85
24)20.40
-192
---
120
-120
---
0
```
验算：$0.85×2.4=2.04$
$36.4÷5.2$
```
7
52)364
-364
---
0
```
验算：$7×5.2=36.4$
$6.21÷0.3$
```
20.7
3)62.1
-60
---
21
-21
---
0
```
验算：$20.7×0.3=6.21$
答案：$0.85$，$7$，$20.7$
```
0.85
24)20.40
-192
---
120
-120
---
0
```
验算：$0.85×2.4=2.04$
$36.4÷5.2$
```
7
52)364
-364
---
0
```
验算：$7×5.2=36.4$
$6.21÷0.3$
```
20.7
3)62.1
-60
---
21
-21
---
0
```
验算：$20.7×0.3=6.21$
答案：$0.85$，$7$，$20.7$
三、计算下面各题。
$2.24×16.5÷0.6$ $22.56÷4.7×5.4$
$3.072÷6.4+49.7$ $60.8-36÷7.5$
$2.24×16.5÷0.6$ $22.56÷4.7×5.4$
$3.072÷6.4+49.7$ $60.8-36÷7.5$
答案
61.6 25.92 50.18 56
解析
2.24×16.5÷0.6
=36.96÷0.6
=61.6
22.56÷4.7×5.4
=4.8×5.4
=25.92
3.072÷6.4+49.7
=0.48+49.7
=50.18
60.8-36÷7.5
=60.8-4.8
=56
=36.96÷0.6
=61.6
22.56÷4.7×5.4
=4.8×5.4
=25.92
3.072÷6.4+49.7
=0.48+49.7
=50.18
60.8-36÷7.5
=60.8-4.8
=56
