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1.直接写得数。
0.3+1.7=
0.65×0.1=
3.5÷5=
7.2-5.2=
1.2÷6=
0.3+1.7=
2
8.6-0.6=8
6×0.8=4.8
0.65×0.1=
0.065
4.2×0.5=2.1
1.9-0.5=1.4
3.5÷5=
0.7
1-0.98=0.02
0.578×0=0
7.2-5.2=
2
8×1.25=10
0÷5.2=0
1.2÷6=
0.2
500÷1000=0.5
5×3.87×0.2=3.87
答案
解析：这些题目主要考查小数的加减法、乘法和除法的基本运算。
答案：
$0.3 + 1.7 = 2$
$8.6 - 0.6 = 8$
$6 × 0.8 = 4.8$
$0.65 × 0.1 = 0.065$
$4.2 × 0.5 = 2.1$
$1.9 - 0.5 = 1.4$
$3.5 {÷} 5 = 0.7$
$1 - 0.98 = 0.02$
$0.578 × 0 = 0$
$7.2 - 5.2 = 2$
$8 × 1.25 = 10$
$0 {÷} 5.2 = 0$
$1.2 {÷} 6 = 0.2$
$500 {÷} 1000 = 0.5$
$5 × 3.87 × 0.2 = 3.87$
答案：
$0.3 + 1.7 = 2$
$8.6 - 0.6 = 8$
$6 × 0.8 = 4.8$
$0.65 × 0.1 = 0.065$
$4.2 × 0.5 = 2.1$
$1.9 - 0.5 = 1.4$
$3.5 {÷} 5 = 0.7$
$1 - 0.98 = 0.02$
$0.578 × 0 = 0$
$7.2 - 5.2 = 2$
$8 × 1.25 = 10$
$0 {÷} 5.2 = 0$
$1.2 {÷} 6 = 0.2$
$500 {÷} 1000 = 0.5$
$5 × 3.87 × 0.2 = 3.87$
2.列竖式计算。
0.36×25= 0.36
× 25
-----
180
72
-----
9.00 43.2÷18= 2.4
18)43.2
36
-----
72
72
-----
0
3.05+17.5= 3.05
+17.50
------
20.55 42.1-16.5= 42.1
-16.5
-----
25.6
0.36×25= 0.36
× 25
-----
180
72
-----
9.00 43.2÷18= 2.4
18)43.2
36
-----
72
72
-----
0
3.05+17.5= 3.05
+17.50
------
20.55 42.1-16.5= 42.1
-16.5
-----
25.6
答案
```
0.36
× 25
-----
180
72
-----
9.00
2.4
18)43.2
36
-----
72
72
-----
0
3.05
+17.50
------
20.55
42.1
-16.5
-----
25.6
```
0.36
× 25
-----
180
72
-----
9.00
2.4
18)43.2
36
-----
72
72
-----
0
3.05
+17.50
------
20.55
42.1
-16.5
-----
25.6
```
