2025年学霸提优大试卷五年级数学上册苏教版第181页答案
1. 直接写出得数。(每题1分,共8分)
$60÷0.3=$
200
$0.16×0.4=$
0.064
$3.6n+4n=$
7.6n
$0.9^2=$
0.81

7.2+0.27=
7.47
1.1-0.11=
0.99
0.77÷7.7=
0.1
4.6+3.2-4.6+3.2=
6.4

答案

200 0.064 7.6n 0.81 7.47 0.99 0.1 6.4
2. 用竖式计算,带※的要验算。(每题2分,验算1分,共7分)
10.6-7.632=
2.968
※0.064×0.95=
0.0608
7.92÷3.9≈
2.03

(得数保留两位小数)

答案

2.968 0.0608 2.03

解析

```
10.600
7.632
--------
2.968
0.064
×0.95
------
320
576
------
0.06080
验算：
0.95
×0.064
------
380
570
------
0.06080
2.030
3.9)7.920
7 8
----
120
117
----
30
30
----
0
≈2.03
```
3. 计算下面各题,能简算的要简算。(每题3分,共12分)
5.4÷(0.27×4) 0.63+0.99×99+0.36
(27.5-18.8)÷0.29×0.8 63.2×0.1+6.32×9

答案

5 99 24 63.2

解析

5.4÷(0.27×4)
=5.4÷0.27÷4
=20÷4
=5
0.63+0.99×99+0.36
=(0.63+0.36)+0.99×99
=0.99+0.99×99
=0.99×(1+99)
=0.99×100
=99
(27.5-18.8)÷0.29×0.8
=8.7÷0.29×0.8
=30×0.8
=24
63.2×0.1+6.32×9
=6.32×1+6.32×9
=6.32×(1+9)
=6.32×10
=63.2