一、用竖式计算。
$0.68×0.14$ $5.4×0.39$ $2.42×0.25$
$0.65×1.14$ $4.58×1.05$ $7.06×8.5$
$0.56×4.25$ $0.28×2.15$ $0.37×2.4$
$4.7×1.5$ $36×0.56$ $3.2×0.2$
(得数保留一位小数) (得数保留一位小数) (得数保留一位小数)
$3.08×0.43$ $8.07×0.32$ $0.77×0.35$
(得数保留两位小数) (得数保留两位小数) (得数保留两位小数)
$0.68×0.14$ $5.4×0.39$ $2.42×0.25$
$0.65×1.14$ $4.58×1.05$ $7.06×8.5$
$0.56×4.25$ $0.28×2.15$ $0.37×2.4$
$4.7×1.5$ $36×0.56$ $3.2×0.2$
(得数保留一位小数) (得数保留一位小数) (得数保留一位小数)
$3.08×0.43$ $8.07×0.32$ $0.77×0.35$
(得数保留两位小数) (得数保留两位小数) (得数保留两位小数)
答案
一、0.0952 2.106 0.605 0.741 4.809 60.01 2.38 0.602 0.888 7.1 20.2 0.6 1.32 2.58 0.27
解析
0.68×0.14=0.0952
```
0.68
×0.14
------
272
68
------
0.0952
```
5.4×0.39=2.106
```
5.4
×0.39
------
486
162
------
2.106
```
2.42×0.25=0.605
```
2.42
×0.25
------
1210
484
------
0.6050
```
0.65×1.14=0.741
```
0.65
×1.14
------
260
65
65
------
0.7410
```
4.58×1.05=4.809
```
4.58
×1.05
------
2290
000
458
------
4.8090
```
7.06×8.5=60.01
```
7.06
× 8.5
------
3530
5648
------
60.010
```
0.56×4.25=2.38
```
4.25
×0.56
------
2550
2125
------
2.3800
```
0.28×2.15=0.602
```
2.15
×0.28
------
1720
430
------
0.6020
```
0.37×2.4=0.888
```
0.37
×2.4
------
148
74
------
0.888
```
4.7×1.5≈7.1(保留一位小数)
```
4.7
×1.5
------
235
47
------
7.05≈7.1
```
36×0.56≈20.2(保留一位小数)
```
36
×0.56
------
216
180
------
20.16≈20.2
```
3.2×0.2≈0.6(保留一位小数)
```
3.2
×0.2
------
0.64≈0.6
```
3.08×0.43≈1.32(保留两位小数)
```
3.08
×0.43
------
924
1232
------
1.3244≈1.32
```
8.07×0.32≈2.58(保留两位小数)
```
8.07
×0.32
------
1614
2421
------
2.5824≈2.58
```
0.77×0.35≈0.27(保留两位小数)
```
0.77
×0.35
------
385
231
------
0.2695≈0.27
```
答案:
0.0952,2.106,0.605,0.741,4.809,60.01,2.38,0.602,0.888,7.1,20.2,0.6,1.32,2.58,0.27
```
0.68
×0.14
------
272
68
------
0.0952
```
5.4×0.39=2.106
```
5.4
×0.39
------
486
162
------
2.106
```
2.42×0.25=0.605
```
2.42
×0.25
------
1210
484
------
0.6050
```
0.65×1.14=0.741
```
0.65
×1.14
------
260
65
65
------
0.7410
```
4.58×1.05=4.809
```
4.58
×1.05
------
2290
000
458
------
4.8090
```
7.06×8.5=60.01
```
7.06
× 8.5
------
3530
5648
------
60.010
```
0.56×4.25=2.38
```
4.25
×0.56
------
2550
2125
------
2.3800
```
0.28×2.15=0.602
```
2.15
×0.28
------
1720
430
------
0.6020
```
0.37×2.4=0.888
```
0.37
×2.4
------
148
74
------
0.888
```
4.7×1.5≈7.1(保留一位小数)
```
4.7
×1.5
------
235
47
------
7.05≈7.1
```
36×0.56≈20.2(保留一位小数)
```
36
×0.56
------
216
180
------
20.16≈20.2
```
3.2×0.2≈0.6(保留一位小数)
```
3.2
×0.2
------
0.64≈0.6
```
3.08×0.43≈1.32(保留两位小数)
```
3.08
×0.43
------
924
1232
------
1.3244≈1.32
```
8.07×0.32≈2.58(保留两位小数)
```
8.07
×0.32
------
1614
2421
------
2.5824≈2.58
```
0.77×0.35≈0.27(保留两位小数)
```
0.77
×0.35
------
385
231
------
0.2695≈0.27
```
答案:
0.0952,2.106,0.605,0.741,4.809,60.01,2.38,0.602,0.888,7.1,20.2,0.6,1.32,2.58,0.27
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