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1. 比较大小：
$0.98×0.1$ $◯$ $0.98×1$ $35×1.8$ $◯$ $3.5×18$
$(5.7 + 1.3)×4$ $◯$ $5.7×4 + 1.3×4$ $8.39×0.9$ $◯$ $8.39$
$9.8÷0.12$ $◯$ $9.8$ $9.8$ $◯$ $9.8÷1.2$
$0.98×0.1$ $◯$ $0.98×1$ $35×1.8$ $◯$ $3.5×18$
$(5.7 + 1.3)×4$ $◯$ $5.7×4 + 1.3×4$ $8.39×0.9$ $◯$ $8.39$
$9.8÷0.12$ $◯$ $9.8$ $9.8$ $◯$ $9.8÷1.2$
答案
＜ ＝ ＝ ＜ ＞ ＞
2. 根据$13×28 = 364$,直接写出下面各式的积。
$1.3×2.8 = $ $0.13×0.28 = $
$130×2.8 = $ $0.013×2800 = $
$1.3×2.8 = $ $0.13×0.28 = $
$130×2.8 = $ $0.013×2800 = $
答案
3.64 0.0364 364 36.4
3. 在下面的( )里填上合适的数。
$2.05÷0.82 = ($ )$÷82$ $22.78÷3.4 = ($ )$÷34$
$2.05÷0.82 = ($ )$÷82$ $22.78÷3.4 = ($ )$÷34$
答案
205 227.8
4. $1.29595…$的循环节是( ),可以简写成( ),保留两位小数约是( )。
答案
95 1.$\dot{1}\dot{2}\dot{9}\dot{5}$ 1.30
二、列竖式计算。
$3.5×4.6 = $ $0.29×0.07 = $ $6.5×8.4 = $
$9.42÷6 = $ $1.47÷7 = $ $6.6÷12 = $
$3.5×4.6 = $ $0.29×0.07 = $ $6.5×8.4 = $
$9.42÷6 = $ $1.47÷7 = $ $6.6÷12 = $
答案
16.1 0.0203 54.6 1.57 0.21 0.55
解析
```
3.5
×4.6
----
210
140
----
16.1
0.29
×0.07
------
0.0203
6.5
×8.4
----
260
520
----
54.6
1.57
6)9.42
6
---
34
30
---
42
42
---
0
0.21
7)1.47
1.4
---
07
07
---
0
0.55
12)6.60
60
---
60
60
---
0
```
3.5
×4.6
----
210
140
----
16.1
0.29
×0.07
------
0.0203
6.5
×8.4
----
260
520
----
54.6
1.57
6)9.42
6
---
34
30
---
42
42
---
0
0.21
7)1.47
1.4
---
07
07
---
0
0.55
12)6.60
60
---
60
60
---
0
```
