题目内容
用竖式计算.(除不尽的保留两位小数,第6小题要验算)
88.2÷7=
52.65÷13=
15.75÷2.1=
7.42÷1.2=
0.285÷0.38=
9.25÷3.7=
88.2÷7=
52.65÷13=
15.75÷2.1=
7.42÷1.2=
0.285÷0.38=
9.25÷3.7=
分析:本题根据小数除法的运算法则列竖式计算即可,验算时据乘法与除法的互逆运算的关系进行验算即可.
解答:(1)88.2÷7=12.6;
(2)52.65÷13=4.05;
(3)15.75÷2.1=7.5;
(4)7.42÷1.2≈6.18;
(5)0.285÷0.38=0.75;
(6)9.25÷3.7=2.5;
验算:
|
7 |
18 |
14 |
4 2 |
4 2 |
0 |
(2)52.65÷13=4.05;
|
52 |
65 |
65 |
0 |
(3)15.75÷2.1=7.5;
|
147 |
10 5 |
10 5 |
0 |
(4)7.42÷1.2≈6.18;
|
72 |
2 2 |
1 2 |
1 00 |
96 |
40 |
36 |
4 |
(5)0.285÷0.38=0.75;
|
26 6 |
1 90 |
1 90 |
0 |
(6)9.25÷3.7=2.5;
|
74 |
18 5 |
18 5 |
0 |
验算:
|
. |
1 7 5 |
7 5 |
9. 2 5 |
点评:在完成小数除法式将除数化为整数时要注意被除数小数点位置的变化.
练习册系列答案
相关题目